Set ToolTipService.Placement="Center"
<Window x:Class="WpfApplication1.Window1" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" Title="WPF" Height="200" Width="300"> <StackPanel> <Button Height="40" Margin="5" ToolTipService.Placement="Center"> <Button.ToolTip> <ToolTip> ToolTip displayed for 5 seconds... </ToolTip> </Button.ToolTip> Button with Centered ToolTip </Button> </StackPanel> </Window>