Connector

A connector, comprising:

• a housing (10) connectable to a mating housing (90);
• and
• a detector (11) movable in the housing (10) in a front-rear direction, the detector (11) being allowed to move from a standby position to a detection position in front of the standby position when the housing (10) is connected properly to the mating housing (90);
• wherein:
• the housing (10) includes a protrusion (27) on a side surface;
• the detector (11) includes a side wall (53) configured to cover the side surface of the housing (10);
• the side wall (53) includes a resilient piece (55) configured to bulge out by interfering with the protrusion (27) in a moving process to the detection position and eliminate bulge at the detection position;
• and
• a side surface of the side wall (53) includes a rearward facing surface (57) arranged to face rearward at a position adjacent to the resilient piece (55) via slits (54) formed on both sides of the resilient piece (55).