An object of the present invention is to reduce the size of a connection structure for a housing member for housing a portion of a wire-shaped transmission member and a protective tube for covering the wire-shaped transmission member. A connection structure for a housing member and a protective tube includes a wire-shaped transmission member, a housing member for housing a first portion which is a portion of the wire-shaped transmission member, and a protective tube for covering a second portion which is another portion of the wire-shaped transmission member. The housing member includes a housing body portion for housing the first portion and an extended portion that protrudes toward the second portion from the housing body portion, and an end portion of the protective tube covers the extended portion.