of the retainer 23 on the other hand the body 23 a of the retainer 23 to be mounted into this retainer mount hole 22 is formed into a frame shape to enable the female terminals 9 a 9 b to pass therethrough and each frame portion is formed with a locking projection 24 capable of locking the rear end of the terminal connecting portion 10 of each female terminal 9 a 9 b further although not shown in detail the both legs of the retainer 23 are locked at two depth positions in the corresponding leg accommodating portions 22 b with the result that the retainer 23 is held at two positions i e a partial locking position and a full locking position with respect to the housing 15 at the partial locking position each locking projection 24 waits outside an entrance path for the female terminal 9 a 9 b so that each female terminal 9 a 9 b is inserted freely into and withdrawn from the cavity 18 however at the full locking position each locking projection 24 projects into the entrance path for the female terminal 9 a 9 b thereby being able to lock the rear end of the terminal connecting portion 10 next the first terminal accommodating portions 16 are described as shown in fig7 the first terminal accommodating portions 16 are arranged in two rows along the.