An electromagnetic driven membrane pump has a pump housing inside which at least one pump chamber (15) having at least one intake and outlet is formed and delimited between a gable (1) of the pump housing and at least one completely-sealed membrane (14) attached to a wall (4) of the pump housing and, in an axial direction of the pump housing, to a running axle (13) suspended in at least two separated suspensions in a longitudinal direction of the axle (13). At least one of the suspensions is composed of a flat spring (9) attached to the axle (13) in a radial direction out toward the wall (4) of the pump housing. The axle (13) is composed of magnetic material to be driven by a magnetic field from an electromagnet (7) for oscillation in its longitudinal direction and moving the membrane (14) in corresponding oscillating movement. The flat spring (9) is composed of an inner and at least one outer part, with the inner part attached to the axle (13) and the outer part(s) attached to the pump housing. These parts are connected with one another by two elastic legs, arranged at each side of the point where the spring is attached to the axle (13).