A mobile concrete pump comprising a structural frame (14) mounted on the undercarriage (10) of a truck chassis (12), a boom stand (22) that is provided on the structural frame (14) and that is rotatable about a vertical axis (20) and a concrete distribution boom (24) configured in the form of multi-arm articulated boom (24). The concrete distributing boom consisting, for example, of six arms, which arms can rotate with respect to one another. In order to make possible the use of a distributing boom with a longer reach, a trailer (32) having its own undercarriage (34) is provided, said trailer being connected to the truck undercarriage (10) by a coupling member (36) in the transport condition. The trailer (32) has a pivot member (40) rotatable about a vertical axis (38) for receiving an arm set (42) that projects beyond the rear end of the truck undercarriage (10) in the transport condition.

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.