A respiratory mask includes a support frame, a mask pad, and an air duct. The support frame includes a base portion, an insert portion defining an air channel, a positioning pin having a hooked end, and two wing portions respectively disposed at lateral sides of the base portion. The mask pad has a main body, a through hole, and a face pad mounted on the main body. The main body has an open end portion abutting separably against the base portion and defining an opening for extension of the insert portion thereinto, and is clamped separably between the wing portions. The positioning pin engages removably the through hole. The air duct is connected to the support frame and communicates with the air channel.
