To provide a dryer for a tile joining sheet which has a short drying time and prevents poor joint due to the contraction of the tile joining sheet.

A dryer for a tile joining, sheet is a device for drying a tile joining sheet which is adhered to one group of tiles mounted on a tile arrangement pallet 11 by an adhesive. A duct 18 is arranged upward of an endless chain conveyer 13 conveying the tile arrangement pallet 11 along the direction in which a conveyer 13 travels, and hot air is fed into the duct 18 to be blown toward a tile joining sheet 20 from a vent hole 18a that is formed at the bottom surface of the duct 18 to dry the sheet.