Disclosed is a method for producing a tooth having a desired length in one direction. Specifically disclosed is a method for producing a tooth having a desired length in one direction, which comprises the steps of: placing a first cell aggregate and a second cell aggregate in the inside of a support while bringing the first and second cell aggregates into close contact with each other and culturing the first and second cell aggregates in the inside of the support, wherein the first cell aggregate is composed of one of mesenchymal cells or epithelial cells and the second cell aggregate is composed of the other, and the size of the tooth is controlled by adjusting the length of contact between the first cell aggregate and the second cell aggregate in one direction.
