A crash test apparatus for truck cabs includes a fixture frame mounting a cab, a cart mounting the fixture frame, a protruding barrier disposed in front of the cab, and a crash device moving the cart to make the cab crash against the protruding barrier. The crash test apparatus includes a frame deformation amount reproduction mechanism disposed between a front of the cart and the protruding barrier, and when the crash device operates, deforming by a deformation amount of a frame of a vehicle on which the cab is mounted, to make the cab crash against the protruding barrier.