Continuous firing furnace

Provided is a continuous firing furnace that reduces deviation in conveyance of an object to be processed. The continuous firing furnace comprises a furnace body, a conveying roller, a supporting structure of the conveying roller, and a driving device. The furnace body has a first side wall and a second side wall. The support structure of the conveying roller comprises a first support frame; a first support member that is rotatably supported by the first support frame via a bearing and that supports a first end portion of the conveyance roller that penetrates through the first side wall; a second support frame; and a second support member that is rotatably supported by the second support frame via a bearing and that supports a second end portion of the conveyance roller that penetrates through the second side wall. A part of a first roller group among the plurality of conveying rollers is provided with a chain wheel on a first supporting component and is connected with a driving device. A second roller group