Abstract: The apparatus comprises a control for intermittent operation of the reciprocating drive in such a manner, that the drive, taking the topmost position of the multi-needle injector as a point of departure, is started by receiving a synchronizing signal produced when the intermittent advancement of the production line stops in a correct position, after which the drive carries out a complete cycle of downward and upward movement of the multi-needle injector and stopping in said topmost position in readiness for a new synchronizing signal, the cycle time of the drive being shorter than the time of rest for the intermittent advancement of the production line, whereas the multi-needle injector is designed to cover a space in the direction of advancement of the production line corresponding to at least one advancement step for the intermittent advancement of the food product by the production line.