The invention relates to a check valve comprising a valve body (1) provided with a valve seat (2) formed in the valve body (1), a valve plunger (4) which is guided in a guiding borehole (3) of the valve body (1), and a valve disk (5) which is embodied on the valve plunger (4) and can be applied to the valve seat (2) arranged in the valve body (1) in a sealing manner. The admission (6, 7) to the check valve (1) is carried out by means of at least one supply groove (6) embodied in the front side (8) of the valve body (1), opposing the valve seat (2), and at least one supply borehole (7) formed in the valve body (1). The inventive check valve (20) is especially suitable for a radial piston pump for the high-pressure supply of fuel in fuel injection systems of internal combustion engines.