A device for the drive control of a two-cylinder thick matter pump, - with two conveying cylinders (14, 14') which issue via end-face orifices into a material feed container and the conveying pistons (16, 16') of which can be actuated by means of hydraulically activated drive cylinders (18, 18') alternately in reciprocal motion so as to execute a filling stroke and a conveying stroke (19"), - with a pipe switch which is arranged inside the material feed container, can be connected by means of a hydraulic drive mechanism alternately on the inlet side to the orifice of one of the conveying cylinders (14, 14') and releases the orifice of the other conveying cylinder (14, 14') in each case and which is connected on the outlet side to a conveying line, - with a motor-driven hydraulic variable displacement pump which has a suction inlet connected to a pressureless reservoir and a high-pressure outlet, - the drive cylinders (18, 18') being connectable alternately, in each case via a hydraulic connection (38, 38') located at one of their ends, by means of a first reversing valve to the high-pressure outlet of the variable displacement pump via a delivery line and to the reservoir via a return line, - the drive cylinders (18, 18') being connected to one another at their other end via a rocking oil line, - the hydraulic drive mechanism of the pipe switch having a cylinder arrangement which is activated on two sides and the connections of which can be connected alternately via a second reversing valve to the delivery line leading to the high-pressure outlet of the hydraulic variable displacement pump and to the return line leading to the reservoir, - and with a central control, responding to end-of-travel signals of the passing drive pistons (20, 20') of at least one of the drive cylinders (18, 18'), for triggering a follow-up control for the first and second reversing valve, characterized - in that a setting throttle is arranged in the delivery line between the high-pressure outlet of the variable displacement pump and the first reversing valve, - in that a control line leading directly to an adjusting mechanism of the variable displacement pump is fed back from the delivery line downstream of the setting throttle, - and in that a connecting line leading to a supply connection of the second reversing valve is branched off from the delivery line upstream (58") of the setting throttle. - with two conveying cylinders (14, 14') which issue via end-face orifices into a material feed container and the conveying pistons (16, 16') of which can be actuated by means of hydraulically activated drive cylinders (18, 18') alternately in reciprocal motion so as to execute a filling stroke and a conveying stroke (19"), - with a pipe switch which is arranged inside the material feed container, can be connected by means of a hydraulic drive mechanism alternately on the inlet side to the orifice of one of the conveying cylinders (14, 14') and releases the orifice of the other conveying cylinder (14, 14') in each case and which is connected on the outlet side to a conveying line, - with a motor-driven hydraulic variable displacement pump which has a suction inlet connected to a pressureless reservoir and a high-pressure outlet, - the drive cylinders (18, 18') being connectable alternately, in each case via a hydraulic connection (38, 38') located at one of their ends, by means of a first reversing valve to the high-pressure outlet of the variable displacement pump via a delivery line and to the reservoir via a return line, - the drive cylinders (18, 18') being connected to one another at their other end via a rocking oil line, - the hydraulic drive mechanism of the pipe switch having a cylinder arrangement which is activated on two sides and the connections of which can be connected alternately via a second reversing valve to the delivery line leading to the high-pressure outlet of the hydraulic variable displacement pump and to the return line leading to the reservoir, - and with a central control, responding to end-of-travel signals of the passing drive pistons (20, 20') of at least one of the drive cylinders (18, 18'), for triggering a follow-up control for the first and second reversing valve, - in that a setting throttle is arranged in the delivery line between the high-pressure outlet of the variable displacement pump and the first reversing valve, - in that a control line leading directly to an adjusting mechanism of the variable displacement pump is fed back from the delivery line downstream of the setting throttle, - and in that a connecting line leading to a supply connection of the second reversing valve is branched off from the delivery line upstream (58") of the setting throttle.