A coaxial connector having excellent shielding performance. The coaxial connector 30 includes a coaxial cable 12, an outer conductor terminal 32 connected to a top end of the coaxial cable 12, an opening portion 34, stabilizers 36, and an engaging piece 44. The opening portion 34 locks a locking piece of a connector housing used to house the coaxial connector 30, the stabilizers 36 control an insertion orientation of the coaxial connector 30 into the housing, the engaging piece 44 engages with the locking piece, and they are provided on a peripheral surface at a main section of the outer conductor terminal 32. The opening portion 34 is closed by a main section of an outer conductor terminal of a counterpart coaxial connector when the connectors are mated. The engaging piece 44 functions as a guide plane when the stabilizers 36 are inserted into a slit of the housing.