Electrical junction box

An electrical junction box comprising:

• a circuit structure;
• a case main body that is made of a synthetic resin and that has an accommodating portion that accommodates the circuit structure;
• and
• a cover that is made of a metal and that is attached to the case main body, covering the accommodating portion of the case main body,
• wherein the cover made of metal has a covering wall that covers the accommodating portion of the case main body and a side wall that is continuous with the covering wall and that is disposed around the case main body,
• the case main body is provided with an abutment portion that abuts on a portion of the side wall of the cover made of metal, but not on an end portion of the side wall that is located on the side facing away from the covering wall, and
• gaps are formed between the case main body and the cover made of metal, the gaps being respectively located on the side facing the covering wall and the side facing away from the covering wall with respect to the abutment portion.