To make the width and height of the finished surface of a filler uniform by attaching a foot part for regulating the angle between a spatula and a wall surface part to one end of the spatula for finishing the surface of a filler packed in a groove part which is formed by the step between wall surface parts.

A spatula 1 for finishing a filler is inserted into a receiving member 2 and fixed, and a foot part 3 for regulating the angle between the spatula 1 and a wall surface part W to be constant is attached freely swingably to one end of the member 2. The foot part is composed of a V shaped foot 31 and a guide member 4 having a wedge-shaped cross section which is fixed at the end of a foot 31. The guide member 4 is rolled in a groove M by a guide roller 40 having a V-shaped cross section as a rolling part to guide the spatula 1 in the transfer direction along the groove M. In this way, the width and height of the finished surface of a filler J packed in the groove formed by the step between the wall surface parts W.