This welding device has a housing having a first region and a second region and a partition part forming a boundary between the first region and the second region. Furthermore, a first fan and a second fan are disposed in proximity to a front surface part of the housing. The partition part has an opening part that connects the first region and the second region. Air circulating in the first region and air circulating in the second region circulate with each other via the opening part, and both the air circulating in the first region and the air circulating in the second region are discharged from both a first discharge opening and a second discharge opening.
