There is provided a connector that makes it difficult for a person to come into contact with a tip of a needle and that facilitates injection of a liquid using the needle, A housing (50) protects a tip (31) of a needle (30) when sliding of the housing (50) and a first connector member (40) is locked, a first lock portion (1L) is provided on an inner circumferential surface (40i) of the first connector member (40), and the first lock portion (1L) engages with an access member (101) to thereby unlock the housing (50), and separates from the access member (101) to thereby maintain the housing (50) locked.
