Electrical junction box

An electrical junction box comprising:

• a housing in which an electronic component is provided, the housing having a fixing wall configured to be fixed to a target object;
• a plate-shaped bus bar arranged opposing the fixing wall and connected to the electronic component;
• and
• a plurality of heat dissipation plates provided standing in a direction intersecting the bus bar, and configured to dissipate heat from the bus bar,
• wherein a pair of side walls extending toward the fixing wall are provided in the housing at respective opposing edges of an opposing wall that opposes the fixing wall,
• a second through hole is formed in each of the side walls,
• the heat dissipation plates extend in an opposing direction in which the pair of side walls oppose each other, and
• the second through hole of one of the side walls and the second through hole of another one of the side walls are formed at positions corresponding to a gap between an adjacent pair of the heat dissipation plates, so as to oppose each other in the opposing direction.