To provide a magnetron capable of preventing the bonding failure between an antenna lead and a vane, improving quality, and reducing the working time and the cost.

In this magnetron, any one of an antenna lead 18 and a vane 12 is formed with a projecting part, and the other is formed with an insertion part, in which the projecting part is to be inserted. Practically, a bonding part of the vane 12 is formed with a projecting part 12c, and a bonding part of the antenna lead 18 is formed with a hole 18b as an insertion part, in which the projecting part 12c formed in the vane 12 is to be inserted.