Electrical junction box

An electrical junction box comprising:

• a case;
• a relay that is attached to the case;
• a first heat dissipation member that is connected to the relay so as to be able to transfer heat;
• and
• a second heat dissipation member that is connected to the first heat dissipation member so as to be able to transfer heat,
• wherein the case includes a first case member, a second case member, and a first coupling portion and a second coupling portion that couple the first case member and the second case member to each other,
• the first case member, the first heat dissipation member, the second heat dissipation member, and the second case member are stacked in this order in a predetermined first direction,
• the first coupling portion and the second coupling portion are arranged at an interval in a second direction that is orthogonal to the first direction, with the first heat dissipation member and the second heat dissipation member being interposed therebetween,
• the first coupling portion is provided on an outer peripheral portion of the case, and
• the second coupling portion is provided inward of the outer peripheral portion of the case.