A connector in the present disclosure is a connector 10 provided with an inner conductor 20 and an inner housing 30. The inner housing 30 is formed by assembling a first housing 31 and at least one second housing 42 with each other. The first housing 31 includes a first side wall 34 and the second housing 42 includes a second side wall 46. The second side wall 46 is arranged from a protection wall 43 to overlap the first side wall 34. The first and second side walls 34, 46 include a slide mechanism 50. The slide mechanism 50 includes a fitting portion 36 on either one of the first and second side walls 34, 46 and a fitting hole 47 in the other side wall. The fitting hole 47 is formed to be longer in a front-rear direction than the fitting portion 36.