A conveying system for conveying a workpiece via an opening of a wall disposed between a set area and a processing area, the conveying system comprising: abase ; and a guide member provided on the base ; characterized in that the conveying system comprises: a first moving element guided by said guide member , so as to be movable between the set area and the processing area; a second moving element adapted to have a workpiece mounted thereon, and disposed on the first moving element ; a support mechanism which supports the second moving element with respect to the first moving element , and has a spring disposed between the first moving element and the second moving element and which supports a weight of at least a part of the second moving element ; and a fixing mechanism for fixing the second moving element to the base in the processing area, and having a first mode in which the spring is elastically deformed by applying a predetermined force in addition to the weight of the second moving element , thereby mechanically engaging the base and the second moving element with each other, and a second mode in which the predetermined force on the spring is released, thereby releasing the mechanical engagement between the base and the second moving element . abase ; and a guide member provided on the base ; characterized in that the conveying system comprises: a first moving element guided by said guide member , so as to be movable between the set area and the processing area; a second moving element adapted to have a workpiece mounted thereon, and disposed on the first moving element ; a support mechanism which supports the second moving element with respect to the first moving element , and has a spring disposed between the first moving element and the second moving element and which supports a weight of at least a part of the second moving element ; and a fixing mechanism for fixing the second moving element to the base in the processing area, and having a first mode in which the spring is elastically deformed by applying a predetermined force in addition to the weight of the second moving element , thereby mechanically engaging the base and the second moving element with each other, and a second mode in which the predetermined force on the spring is released, thereby releasing the mechanical engagement between the base and the second moving element . a first moving element guided by said guide member , so as to be movable between the set area and the processing area; a second moving element adapted to have a workpiece mounted thereon, and disposed on the first moving element ; a support mechanism which supports the second moving element with respect to the first moving element , and has a spring disposed between the first moving element and the second moving element and which supports a weight of at least a part of the second moving element ; and a fixing mechanism for fixing the second moving element to the base in the processing area, and having a first mode in which the spring is elastically deformed by applying a predetermined force in addition to the weight of the second moving element , thereby mechanically engaging the base and the second moving element with each other, and a second mode in which the predetermined force on the spring is released, thereby releasing the mechanical engagement between the base and the second moving element . <EOS>