Provided is a connector that makes it difficult for a person to come into contact with the tip of a needle, and that facilitates injection of a liquid using the needle. In the present invention, when a housing (50) and a slide of a first connector member (40) are locked, the housing (50) protects a tip (31) of a needle (30), the first lock part (1L) is provided on an inner peripheral surface (40i) of the first connector member (40), and the first lock part (1L) engages with an access member (101) to unlock the housing (50), and separates from the access member (101) to keep the housing (50) locked.
