An aircraft pressurized cabin door (1) having a fuselage panel (2) and a door structure (3) that includes: two circumferential beams (4) arranged on the lateral edges of the door (1); a plurality of longitudinal beams (5). Each longitudinal beam (5) is an open profile having an outer face to which the fuselage panel (2) is fixed and an inner face, the door structure (3) further including an internal force-absorbing frame (12) fixed to the inner face of each longitudinal beam (5), this internal force-absorbing frame (12) having a plurality of uprights (13) each extending opposite a circumferential beam (4), each upright (13) being fixed to several longitudinal beams (5).