To simplify an assembling process and reduce a height while keeping a reliable waterproof structure by improving structures of a housing and an elastic body. Provided are an insulative housing 31, an insulative elastic body 40 which is held by the housing 31, and terminal pins 50 which penetrate through the elastic body 40 and are held by the housing 31. The insulative elastic body 40 has an outside elastic portion 41 and inside elastic portions 42 into which the insulative elastic body 40 is partitioned by the housing 31 and link portions 45 which link the outside elastic portion 41 to the inside elastic portions 42. The housing 31 is provided with wall portions 35 with which the inside elastic portions 42 through which the respective terminal pins 50 penetrate are in contact in a compressed state.