To provide a board treating apparatus capable of suppressing the occurrence of a scratch etc. on the rollers for supporting the lower end of a board when the board is treated while it is being transferred at a predetermined tilting angle.

In this treating apparatus 1 for treating the board 3 while transferring it, transferring rollers 4 for transferring the board 3 while supporting it at a predetermined angle, and lower end supporting rollers 5 for supporting the lower end of the board 3 transferred by the transferring rollers 4 are provided in a treatment chamber 2. The transferring rollers 4 are rotationally driven by a motor 8, thereby the lower end supporting roller 5 are rotated accompanying the transfer of the board 3.