An electric connection box according to one aspect of the present invention can include conductive members on a circuit board, a case accommodating the circuit board, a ventilation path formed in the case and through which air can flow in a vertical direction, a suction port formed in the case to be in communication with the ventilation path, an exhaust port formed in the case to be in communication with the ventilation path, the exhaust port positioned above the suction port, cooled portions positioned on the conductive members and positioned in the ventilation path so as to allow air to flow in the vertical direction between conductive members, and heat generating components connected to the cooled portions of the conductive members.