To achieve a choke structure of a high-frequency heating device easy to manufacture while securing high-frequency shielding performance through prevention of progress of high frequencies propagated along a door choke groove in a simple structure.
In the high-frequency heating device including a heating chamber 1 with an opening 3 for housing a heated object 10 inside, a door 4 covering the opening 3 in free opening and closing, an opening peripheral edge portion 5 prepared around the opening 3 in opposition to the door 4, and a high-frequency supply unit 2 supplying high frequencies into the heating chamber 1, the door 4 has a choke structure opposed to the opening peripheral edge portion 5 at a closed state of the door 4, and the choke structure is of a structure having choke elements 9 divided by slits 6 and with a bag-like cross section, the choke elements 9 being periodically arranged in a comblike form, and being prepared in opposition to a periodic structure direction at parts where the periodic makeup of the choke structure gets discontinuous.
Daisuke Nagano
Kentaro Fujii