Object thickness measuring apparatus being applicable to thickness measurement for an object which may be conveyed

This invention relates to an object thickness measuring apparatus including a seat frame; a conveying mechanism disposed on a machine table board, wherein the conveying mechanism is provided with a rail rest, and the rail rest is provided with a conveying channel for conveying an object; a first measurement instrument disposed on the seat frame to detect the object conveyed by the conveying channel; and a moving mechanism used for holding the seat frame or the conveying mechanism and capable of driving the seat frame or the conveying mechanism to horizontally move relative to the machine table board. Therefore, the object thickness measuring apparatus is applicable to thickness measurement for an object which may be conveyed.