The Panther tank, officially Panzerkampfwagen V Panther (abbreviated PzKpfw V) with ordnance inventory designation: Sd.Kfz. 171, is a German medium tank of World War II. It was used on the Eastern and Western Fronts from mid-1943 to the end of the war in May 1945.

On 27 February 1944 it was redesignated to just PzKpfw Panther, as Hitler ordered that the Roman numeral "V" be deleted. In contemporary English-language reports it is sometimes referred to as the "Mark V".