A ventilation member (1A) is provided with a wall section (2a) and an attachment section (2b), and has a plurality of recessed sections (2d). The wall section (2a) is formed so as to surround the recessed sections (2d), and enables ventilating between the inner peripheral surface facing the recessed sections (2d) and the outer peripheral surface on the opposite side from the inner peripheral surface. The attachment section (2b) is formed so as to extend in the circumferential direction around a rectangular opening (2c), and provides an attachment surface for attaching to a housing (50) requiring ventilation. The ventilation member (1A) is formed using a porous resin, and is formed by integrating at least the wall section (2a) and the attachment section (2b).