Fuel injection pump with a cam drive 3 effecting the feeding movement of a pump piston 1 which is provided with a rotating part 1,2 being rotationally connected with the pump piston 1 and a drive ring 21 for the pump drive being rotatable by about a certain angle for the purpose of starting the feeding change, whereby the rotating of the drive ring 21 is performed by an injection adjustment bolt 22 which radially penetrates the drive ring and which is pivotable by means of an injection adjustment piston 23 mounted tangentially to the drive ring 21, whereby the injection adjustment bolt 22 is provided with axial front faces 41,43 coacting in both axial directions with support faces 24,25 which are independent from the injection adjustment bolt for its axial securing.