A gas supply socket can be used for mounting medical equipment in an appropriate gesture no matter the extending direction of a pipe joint. The gas supply socket (2) comprises the following components: a socket base part (6) which is provided with an inflow port (31), and a socket body part (5) which is provided with a discharging opening (11) and is detachably fixed on the socket base part. The socket body part is provided with the following components: a socket part (13) which allows insertion of an insertion plug (3), and pins (15a,15b) which are projected at one end of the socket base part. The socket base part comprises a base platform (32) and a pin receiving component (33). The base platform is provided with a concave-convex part (82) which is provided with a plurality of locking grooves (81) with a preset distance in a circumferential direction on a cylinder part (50) which is connected with the socket body part. The pin receiving component is rotatably equipped on the cylinder part and commprises the following components: a receiving part (92) which is provided with through holes (91a,91b) for insertion of pins of the socket body part, and locking sheets (93) which can be locked with the locking grooves.
