A combined connector includes a first housing that has a first terminal receiving chamber for receiving a first terminal and a second housing that is stacked on the first housing and has a second terminal receiving chamber for receiving a second terminal. The first housing includes a retaining projection which projects and inserts into the second terminal receiving chamber to retain the second terminal in the second terminal receiving chamber and a terminal retaining portion which retains the first terminal received in the first terminal receiving chamber and is disposed so as to contact with the second housing in a state that the first housing and the second housing are stacked together.