To provide electric components having a case that can be applied to electric elements having lead wires of various kinds of outer diameters.

The electric component is sealed into a case 1 having an opening 2 by resin, and the lead wire is led to the outside. A first width for leading the lead wire to the outside and a first groove section 3 having a first depth are provided on a side wall end face 1a of the case 1. Further, a second groove section 8 having a second width that is smaller than the first width and/or a second depth that is smaller than the first depth is formed at a fitting member 6 that is formed, so that it can be fitted to the first groove section 3. Additionally, a positioning mechanism 5 for regulating the move to the inside of the case 1 of the fitting member 6 is provided at the case 1.