The present invention mainly prevents a sudden decline in a reaction force received from a knee input load, and is related to a knee protector for a vehicle, said protector including a top bracket (23), which generates a high reaction force against the knee input load, and a bottom bracket (24), which generates a reaction force that is lower than that of the top bracket (23), that are arranged vertically and attached directly or indirectly to a vehicle-body strength member (21). At least one part of at least the top bracket (23) includes a closed cross-section area (31). At least one surface of the closed cross-section area (31) is formed into an inward protrusion (32) that protrudes inwards.