-- A first electrical connection box includes a housing, a holder () that is provided inside the housing and holds an electrical component, and a terminal block () attached to the holder (). The terminal block () includes a terminal support base () attached to the holder (), and a busbar () supported on the terminal support base (). The busbar () includes a planar first connection surface () to which a first wire () is to be electrically connected, and a planar second connection surface () to which a second wire () is to be electrically connected, the second wire () being different from the first wire (). When a direction perpendicular to the first connection surface () is defined as a first direction (X11), the second connection surface () is perpendicular to a second direction (X12) that intersects with the first direction (X11). --
