The invention relates to a truck-mounted concrete pump (10) comprising a concrete-distributing boom (14) which is constituted by a plurality of folding boom arms (22, 24, 26, 28) and rotationally mounted on a slewing gear (32) on a chassis (12), and a tilt sensor (18) for detecting a tilt of the truck-mounted concrete pump (10). According to the invention, the truck-mounted concrete pump is provided with a safety device (20) which restricts the operating range (48) of the concrete-distributing boom (14) subject to a tilt of the pump, said safety device being coupled to the tilt sensor (18). The safety device (20) is designed to limit the slewing motion on the slewing gear (32) and/or the swiveling motion of at least one boom arm (22, 24, 26, 28).