An electric connector comprising a pair of interlocking crimp-type terminals having bolt holes in flat contact portions which are brought into concentric relationship when the terminals are locked by means of interlocking lugs each extended from the outer circumference of each terminal. The bolt hole of one or a large terminal has a pair of diametrically opposite notches so that the flat contact portion of the other or a small terminal is partially inserted into the hole of one terminal in such a way that the flat contact portions of the terminals overlap each other with the concentric bolt holes and the interlocking lugs engage with each other, preventing the displacement of the terminals.