A female connector for receiving a male connector, the male connector comprising an outer surface and a groove that is recessed inwards from the outer surface and extends in the circumferential direction, the female connector comprising: a female connector housing defining a fluid channel that extends in the axial direction thereof and comprising a pair of housing openings, the pair of housing openings extending in the circumferential direction of the female connector housing and being in communication with the fluid channel; a support ring comprising a pair of support ring openings, the pair of support ring openings extending in the circumferential direction of the support ring and being in communication with the internal space of the support ring, the support ring being arranged in a fluid channel of the female connector housing, and the pair of support ring openings being respectively aligned with the pair of housing openings; a clip comprising a pair of clip legs and an operation portion connected between proximal ends of the pair of clip legs, and the pair of clip legs being configured to respectively pass through the pair of housing openings and enter the pair of support ring openings; and a clip blocking member being located outside the female connector housing, and having a pair of blocking faces which respectively face distal ends of the two clip legs of the clip, wherein the clip blocking member is connected to the support ring, and the pair of blocking faces are spaced from the outer surface of the female connector housing to accommodate the distal ends of the pair of clip legs, wherein the male connector is capable of being at least partially inserted into the internal space of the support ring located in the fluid channel of the female connector, and wherein when the groove of the male connector is aligned with the pair of housing openings and the pair of support ring openings, the pair of clip legs enter the groove, and the operation portion of the clip is capable of getting into a travel end position; and wherein the pair of blocking faces are configured such that, when the groove is not aligned with the pair of housing openings and the pair of support ring openings, and the pair of clip legs abut against the outer surface of the male connector, the pair of blocking faces prevent the operation portion from getting into the travel end position by abutting against the distal ends of the pair of clip legs. a female connector housing defining a fluid channel that extends in the axial direction thereof and comprising a pair of housing openings, the pair of housing openings extending in the circumferential direction of the female connector housing and being in communication with the fluid channel; a support ring comprising a pair of support ring openings, the pair of support ring openings extending in the circumferential direction of the support ring and being in communication with the internal space of the support ring, the support ring being arranged in a fluid channel of the female connector housing, and the pair of support ring openings being respectively aligned with the pair of housing openings; a clip comprising a pair of clip legs and an operation portion connected between proximal ends of the pair of clip legs, and the pair of clip legs being configured to respectively pass through the pair of housing openings and enter the pair of support ring openings; and a clip blocking member being located outside the female connector housing, and having a pair of blocking faces which respectively face distal ends of the two clip legs of the clip, wherein the clip blocking member is connected to the support ring, and the pair of blocking faces are spaced from the outer surface of the female connector housing to accommodate the distal ends of the pair of clip legs, wherein the male connector is capable of being at least partially inserted into the internal space of the support ring located in the fluid channel of the female connector, and wherein when the groove of the male connector is aligned with the pair of housing openings and the pair of support ring openings, the pair of clip legs enter the groove, and the operation portion of the clip is capable of getting into a travel end position; and wherein the pair of blocking faces are configured such that, when the groove is not aligned with the pair of housing openings and the pair of support ring openings, and the pair of clip legs abut against the outer surface of the male connector, the pair of blocking faces prevent the operation portion from getting into the travel end position by abutting against the distal ends of the pair of clip legs.