diff --git a/src/renderers/WebGLRenderer.js b/src/renderers/WebGLRenderer.js
index c43583e4ef93aad63e33e28ec935a9620ab03d3a..149e6574b5f9b4236ffe3371cc904bc05eae4aa4 100644
--- a/src/renderers/WebGLRenderer.js
+++ b/src/renderers/WebGLRenderer.js
@@ -867,7 +867,7 @@ THREE.WebGLRenderer = function ( parameters ) {
 
 			if ( geometry instanceof THREE.InstancedBufferGeometry && geometry.maxInstancedCount > 0 ) {
 
-				renderer.renderInstances( geometry );
+				renderer.renderInstances( geometry, drawStart, drawCount );
 
 			} else {
 
diff --git a/src/renderers/webgl/WebGLIndexedBufferRenderer.js b/src/renderers/webgl/WebGLIndexedBufferRenderer.js
index 5d2c50110e9ab07198834b34483f4d551672c950..228a0358833dc4cfa625cc53f935cc82a27b3c70 100644
--- a/src/renderers/webgl/WebGLIndexedBufferRenderer.js
+++ b/src/renderers/webgl/WebGLIndexedBufferRenderer.js
@@ -40,7 +40,7 @@ THREE.WebGLIndexedBufferRenderer = function ( _gl, extensions, _infoRender ) {
 
 	}
 
-	function renderInstances( geometry ) {
+	function renderInstances( geometry, start, count ) {
 
 		var extension = extensions.get( 'ANGLE_instanced_arrays' );
 
@@ -53,7 +53,7 @@ THREE.WebGLIndexedBufferRenderer = function ( _gl, extensions, _infoRender ) {
 
 		var index = geometry.index;
 
-		extension.drawElementsInstancedANGLE( mode, index.array.length, type, 0, geometry.maxInstancedCount );
+		extension.drawElementsInstancedANGLE( mode, count, type, start * size, geometry.maxInstancedCount );
 
 	}