COOLING STRUCTURE

PROBLEM TO BE SOLVED: To provide a cooling structure that has an intake hole on one side face and an exhaust hole on the other side face for cooling an electronic circuit unit and that can suck air at a front face and exhaust the air at a back face.SOLUTION: A cooling structure for an electronic circuit unit includes: a separation mechanism having a front face opening part, a first opening part provided on one side face, a second opening part provided on a side face opposed to the first opening part, a back face opening part, and a partition part for guiding air flowing in from the front face opening part to the first opening part; a first duct having a third opening part from which the air exhausted from the first opening part flows in, a first space for changing the flowing direction of the air flowing in from the third opening part, and a fourth opening part from which the air in the first space is exhausted to an intake hole; and a second duct having a fifth opening part from which air exhausted from an exhaust hole flows in, a second space for changing the flowing direction of the air flowing in from the fifth opening part, and a sixth opening part from which the air in the second space is exhausted to the second opening part.