Respiratory protection mask

The invention provides a respiratory protection mask. According to one aspect of the invention, the provided respiratory protection mask comprises a sealing mask element, a valve seat which comprises a suction unit forming a suction port and an exhalation unit forming an exhalation port, a suction valve which selectively blocks off the suction port, and an exhalation valve which selectively blocks off the exhalation port. The suction unit comprises a support element and at least one support rib, the support element is disposed in the suction port and is configured to support the suction valve, and each support rib is provided with an end portion connected with the inner circumferential surface of the suction port and the other end portion connected with the support element and is provided with a vertical cross section the area of which is reduced towards the direction of the front part of the suction port when each support rib is viewed from the support element.