Electrical connection box busbar connecting two wires

An electrical connection box comprising:

• a housing;
• a holder that is provided inside the housing and holds an electrical component, the holder including an attaching portion having a tubular shape extending in a fitting direction;
• and
• a terminal block that is configured to be attached to the holder by insertion into the attaching portion in the fitting direction and includes a terminal support base attached to the holder, and a busbar supported on the terminal support base,
• wherein the busbar includes
• a first connection surface having a planar area to which a first wire is to be electrically connected, and
• a second connection surface having a planar area to which a second wire is to be electrically connected, the second wire being different from the first wire, and
• wherein, when a direction perpendicular to the planar area of the first connection surface is defined as a first direction, the planar area of the second connection surface is perpendicular to a second direction that intersects with the first direction.