A housing 11 includes a base wall 14, left and right side walls 15 rising from the base wall 14, and an open portion 16 open outward at a position facing the base wall 14. An inner surface of the base wall 14 and inner surfaces of the left and right side walls 15 constitute an inner surface of a cavity 18. A recess 21 is provided in the inner surface of the base wall 14. A resiliently deformable resilient portion 24 is provided to project on the side wall 15. The terminal 60 includes a protrusion 66 to be arranged inside the recess 21 and a surface portion 67 facing the resilient portion 24 from a side opposite to the open portion 16.