To provide a tile support implement that can prevent rainwater infiltrating onto a water proof sheet from a broken part or the like of a tile, from being held up on the waterproof sheet to cause a leak in the roof.

This tile support implement is provided with a square bar part fixed to the upper face side of a plurality of rafters arranged in a longitudinal direction from the ridge of a roof to the eaves through a prescribed space from each other, through a plate and a waterproofing sheet and arranged to extend in the lateral direction of the roof almost perpendicular to the rafters, and a recessed part formed to recede in a separating direction from the rafters, on the lower face side of a part, not facing the rafters, of the square bar part, for forming a clearance for the passage of rainwater existing on the waterproof sheet.