diff --git a/src/ooxml/java/org/apache/poi/xslf/usermodel/XSLFTable.java b/src/ooxml/java/org/apache/poi/xslf/usermodel/XSLFTable.java
index 5266c13c09..de0ff27bef 100644
--- a/src/ooxml/java/org/apache/poi/xslf/usermodel/XSLFTable.java
+++ b/src/ooxml/java/org/apache/poi/xslf/usermodel/XSLFTable.java
@@ -39,6 +39,7 @@ import org.apache.xmlbeans.impl.values.XmlAnyTypeImpl;
 import org.openxmlformats.schemas.drawingml.x2006.main.CTGraphicalObjectData;
 import org.openxmlformats.schemas.drawingml.x2006.main.CTNonVisualDrawingProps;
 import org.openxmlformats.schemas.drawingml.x2006.main.CTTable;
+import org.openxmlformats.schemas.drawingml.x2006.main.CTTableCol;
 import org.openxmlformats.schemas.drawingml.x2006.main.CTTableRow;
 import org.openxmlformats.schemas.presentationml.x2006.main.CTGraphicalObjectFrame;
 import org.openxmlformats.schemas.presentationml.x2006.main.CTGraphicalObjectFrameNonVisual;
@@ -62,7 +63,7 @@ public class XSLFTable extends XSLFGraphicFrame implements Iterable<XSLFTableRow
             if (!xc.toChild(XSLFRelation.NS_DRAWINGML, "tbl")) {
                 throw new IllegalStateException("a:tbl element was not found in\n " + god);
             }
-    
+
             XmlObject xo = xc.getObject();
             // Pesky XmlBeans bug - see Bugzilla #49934
             // it never happens when using the full ooxml-schemas jar but may happen with the abridged poi-ooxml-schemas
@@ -104,7 +105,7 @@ public class XSLFTable extends XSLFGraphicFrame implements Iterable<XSLFTableRow
         // cell can be potentially empty ...
         return cells.get(col);
     }
-    
+
     @Internal
     public CTTable getCTTable(){
         return _table;
@@ -135,12 +136,13 @@ public class XSLFTable extends XSLFGraphicFrame implements Iterable<XSLFTableRow
     public double getRowHeight(int row) {
         return Units.toPoints(_table.getTrArray(row).getH());
     }
-    
+
     @Override
     public void setRowHeight(int row, double height) {
         _table.getTrArray(row).setH(Units.toEMU(height));
     }
-    
+
+    @Override
     public Iterator<XSLFTableRow> iterator(){
         return _rows.iterator();
     }
@@ -153,7 +155,7 @@ public class XSLFTable extends XSLFGraphicFrame implements Iterable<XSLFTableRow
         CTTableRow tr = _table.addNewTr();
         XSLFTableRow row = new XSLFTableRow(tr, this);
         // default height is 20 points
-        row.setHeight(20.0);    
+        row.setHeight(20.0);
         _rows.add(row);
         updateRowColIndexes();
         return row;
@@ -169,6 +171,42 @@ public class XSLFTable extends XSLFGraphicFrame implements Iterable<XSLFTableRow
         updateRowColIndexes();
     }
 
+    /**
+     * Add a new column at the end of the table.
+     * @since POI 4.1.2
+     */
+    public void addColumn() {
+        long width = _table.getTblGrid().getGridColArray(_table.getTblGrid().sizeOfGridColArray() - 1).getW();
+        CTTableCol col = _table.getTblGrid().addNewGridCol();
+        col.setW(width);
+        updateRowColIndexes();
+    }
+
+    /**
+     * Insert a new column at the given index.
+     * @param colIdx the column index.
+     * @since POI 4.1.2
+     */
+    public void insertColumn(int colIdx) {
+        if (_table.getTblGrid().sizeOfGridColArray() < colIdx) {
+            throw new IndexOutOfBoundsException("Cannot insert column at " + colIdx + "; table has only " + _table.getTblGrid().sizeOfGridColArray() + "columns.");
+        }
+        long width = _table.getTblGrid().getGridColArray(colIdx).getW();
+        CTTableCol col = _table.getTblGrid().insertNewGridCol(colIdx);
+        col.setW(width);
+        updateRowColIndexes();
+    }
+
+    /**
+     * Remove the column at the given index.
+     * @param colIdx the column index.
+     * @since POI 4.1.2
+     */
+    public void removeColumn(int colIdx) {
+        _table.getTblGrid().removeGridCol(colIdx);
+        updateRowColIndexes();
+    }
+
     static CTGraphicalObjectFrame prototype(int shapeId){
         CTGraphicalObjectFrame frame = CTGraphicalObjectFrame.Factory.newInstance();
         CTGraphicalObjectFrameNonVisual nvGr = frame.addNewNvGraphicFramePr();
@@ -184,12 +222,12 @@ public class XSLFTable extends XSLFGraphicFrame implements Iterable<XSLFTableRow
         XmlCursor grCur = gr.newCursor();
         grCur.toNextToken();
         grCur.beginElement(new QName(XSLFRelation.NS_DRAWINGML, "tbl"));
-        
+
         CTTable tbl = CTTable.Factory.newInstance();
         tbl.addNewTblPr();
         tbl.addNewTblGrid();
         XmlCursor tblCur = tbl.newCursor();
-        
+
         tblCur.moveXmlContents(grCur);
         tblCur.dispose();
         grCur.dispose();
@@ -248,12 +286,12 @@ public class XSLFTable extends XSLFGraphicFrame implements Iterable<XSLFTableRow
     		}
     	}
     }
-    
+
     /**
      * Get assigned TableStyle
      *
      * @return the assigned TableStyle
-     * 
+     *
      * @since POI 3.15-beta2
      */
     protected XSLFTableStyle getTableStyle() {
@@ -262,7 +300,7 @@ public class XSLFTable extends XSLFGraphicFrame implements Iterable<XSLFTableRow
         if (!tab.isSetTblPr() || !tab.getTblPr().isSetTableStyleId()) {
             return null;
         }
-        
+
         String styleId = tab.getTblPr().getTableStyleId();
         XSLFTableStyles styles = getSheet().getSlideShow().getTableStyles();
         for (XSLFTableStyle style : styles.getStyles()) {
@@ -272,7 +310,7 @@ public class XSLFTable extends XSLFGraphicFrame implements Iterable<XSLFTableRow
         }
         return null;
     }
-    
+
     /* package */ void updateRowColIndexes() {
         int rowIdx = 0;
         for (XSLFTableRow xr : this) {
@@ -304,7 +342,7 @@ public class XSLFTable extends XSLFGraphicFrame implements Iterable<XSLFTableRow
 
         Rectangle2D tblAnc = getAnchor();
         DrawFactory df = DrawFactory.getInstance(null);
-        
+
         double nextY = tblAnc.getY();
         double nextX = tblAnc.getX();
 
@@ -323,7 +361,7 @@ public class XSLFTable extends XSLFGraphicFrame implements Iterable<XSLFTableRow
             }
             rowHeights[row] = Math.max(rowHeights[row],maxHeight);
         }
-        
+
         // #2 pass - init properties
         for (int row=0; row<rows; row++) {
             nextX = tblAnc.getX();
@@ -337,7 +375,7 @@ public class XSLFTable extends XSLFGraphicFrame implements Iterable<XSLFTableRow
             }
             nextY += rowHeights[row]+DrawTableShape.borderSize;
         }
-        
+
         // #3 pass - update merge info
         for (int row=0; row<rows; row++) {
             for (int col=0; col<cols; col++) {
diff --git a/src/ooxml/testcases/org/apache/poi/xslf/usermodel/TestXSLFTable.java b/src/ooxml/testcases/org/apache/poi/xslf/usermodel/TestXSLFTable.java
index 632027a8a0..d993b70b90 100644
--- a/src/ooxml/testcases/org/apache/poi/xslf/usermodel/TestXSLFTable.java
+++ b/src/ooxml/testcases/org/apache/poi/xslf/usermodel/TestXSLFTable.java
@@ -68,6 +68,14 @@ public class TestXSLFTable {
             tab.setColumnWidth(1, 60);
             tab.setColumnWidth(2, 60);
 
+            tab.insertColumn(0);
+            assertEquals(tab.getColumnWidth(1), tab.getColumnWidth(0), 0.00001);
+            tab.addColumn();
+            assertEquals(tab.getColumnWidth(tab.getNumberOfColumns() - 2), tab.getColumnWidth(tab.getNumberOfColumns() - 1), 0.00001);
+            tab.removeColumn(0);
+            tab.removeColumn(tab.getNumberOfColumns() - 1);
+            assertEquals(data[0].length, tab.getNumberOfColumns());
+
             int startRow = rowIdx-1;
 
             XSLFTableRow row = tab.getRows().get(0);
@@ -176,7 +184,7 @@ public class TestXSLFTable {
         assertEquals("A1", cells1.get(0).getText());
         assertEquals("B1", cells1.get(1).getText());
         assertEquals("C1", cells1.get(2).getText());
-        
+
         ppt.close();
     }
 
@@ -244,7 +252,7 @@ public class TestXSLFTable {
         assertEquals(VerticalAlignment.MIDDLE, cell1.getVerticalAlignment());
         cell1.setVerticalAlignment(null);
         assertEquals(VerticalAlignment.TOP, cell1.getVerticalAlignment());
-        
+
         XMLSlideShow ppt2 = XSLFTestDataSamples.writeOutAndReadBack(ppt1);
         ppt1.close();
 
@@ -254,25 +262,25 @@ public class TestXSLFTable {
         assertEquals(1, tbl.getNumberOfRows());
         assertEquals("POI", tbl.getCell(0, 0).getText());
         assertEquals("Apache", tbl.getCell(0, 1).getText());
-        
+
         ppt2.close();
     }
-    
+
     @Test
     public void removeTable() throws IOException {
         XMLSlideShow ss = XSLFTestDataSamples.openSampleDocument("shapes.pptx");
         XSLFSlide sl = ss.getSlides().get(0);
         XSLFTable tab = (XSLFTable)sl.getShapes().get(4);
         sl.removeShape(tab);
-        
+
         XMLSlideShow ss2 = XSLFTestDataSamples.writeOutAndReadBack(ss);
         ss.close();
-        
+
         sl = ss2.getSlides().get(0);
         for (XSLFShape s : sl.getShapes()) {
             assertFalse(s instanceof XSLFTable);
         }
-        
+
         ss2.close();
     }
 
@@ -292,7 +300,7 @@ public class TestXSLFTable {
         // so we use something more reliable
         assertTrue(tc0.getTextHeight() > 50);
         assertEquals(0, tc0.getLineWidth(), 0);
-        
+
         ppt.close();
     }