A cutting guide with a sagittal guide plate is made available for generating an outer contour on a bone in order to apply a joint endoprosthesis, in particular a femoral component of a knee endoprosthesis. The cutting guide according to the invention can be oriented relative to the bone and has at least two sagittal guide slits for guiding a bone-cutting tool, wherein the sagittal guide slits extend through the sagittal guide plate and are arranged at an angle to each other.