When FlowDirection is set to RightToLeft: <telerik:RadRichTextBox FlowDirection="RightToLeft" /> RadRichTextBox could work as system's RichTextBox - to layout the text correctly and swap the vertical scrollbar on the left side. Another option to consider is to change the default paragraph style (or 'Normal' style?) to have RTL flow. Currently, when this property is set, the text gets reversed and the vertical scrollbar stays on the right side.