Injecting liquid into food products, comprises transporting the food products on a conveyor (14) passing intermittently under at least one liftable group of needles, injecting the liquid by using the needles, which penetrate into the food product in the form of pieces (12a, 12b), where an outline of the piece is larger than a single group of needles, and the liquid is injected by the needles in each working cycle with a pressure, which is relative to the outline of the piece depending on the position of the needles, in which the needles prick. Injecting liquid into food products, comprises transporting the food products on a conveyor (14) passing intermittently under at least one liftable group of needles, injecting the liquid by using the needles, which penetrate into the food product in the form of pieces (12a, 12b), where an outline of the piece is larger than a single group of needles, and the liquid is injected in each working cycle of the needles with a pressure, which is relative to the outline of the piece depending on the position of the needles, in which the needles prick. The food products, which are non-uniform over their outline consistency, are placed on the conveyor, where the consistency varies in the transport direction of the conveyor and the pressure, at which the liquid is injected, is changed from one operating cycle to another operating cycle. An independent claim is also included for a device for carrying out the above mentioned method comprising a conveyor for the pieces of the food products, at least one lifting movement arranged above the conveyor, a needle carrier (16a, 16b, 16c) equipped with needles and an electronic control unit (20), which is adapted to the pressure, at which the liquid during the operating cycle of the needle carrier is injected into the pieces depending on the position of the needles relative to control of the measured position in the transport direction of the conveyor of the piece, in which the needles pierce.
