An infant incubator including: a left-side treatment door, a right-side treatment door, and an end-side treatment door which are rotatably held, and door-locking devices which fixes the left-side and right-side treatment doors on the end-side treatment door； the door-locking devices are formed from: open-close knobs each mounted rotatably on the left-side and right-side treatment doors and each having a hook-shaped distal end, and knob brackets each mounted on side of the end-side treatment doors having a hollow-shape, the infant incubator in which the treatment doors are fixed in a stand state by inserting the open-close knob into the knob bracket.
