A movable concrete pump comprising a structural frame (14) that is mounted on a truck undercarriage (10) of a truck chassis (12), a boom stand (22) which is disposed on the structural frame (14) and can be rotated about a vertical axis (20), and a concrete distribution boom (24) embodied as a multi-member articulated boom. In order to be able to use a distribution boom having a great range, a trailer (34) is provided that has its own undercarriage (34) and is connected to the truck undercarriage (10) via a coupling member (36). The trailer (32) comprises a prop (40) which is rotatable about a vertical axis (38) and accommodates the set of arms that protrude from the rear end of the truck undercarriage (10) while driving on the road. The set of arms forms the coupling member (36) and encompasses a first boom arm (1) and additional boom arms (2 to 4) that are in a folded position relative to the first boom arm.