An electrical connector includes a first insertion hole and a second insertion hole made on the same straight line in both side faces facing each other in a base, a support contact piece of a first connecting terminal and a second connecting terminal laterally inserted into the first insertion hole and the second insertion hole respectively, and an operation lever rotatably attached to a side face on one side of the base while a front end portion of an FPC is inserted from an opening formed in a side face on the other side of the base. An inspection hole communicated with the first insertion hole and the second insertion hole is made in a bottom surface of the base such that a front end portion of the inserted first connecting terminal and a latch portion of the inserted second connecting terminal can visually be observed.