The invention provides a plastic impression tray for a local area having an outer wall provided in an outer side of a curve of a bottom portion, and an inner wall provided in an inner side of the curve of the bottom portion. A rim having a particular height is provided in the bottom portion side along each of upper ends of the outer wall and the inner wall, elongated through holes each reaching the bottom portion from a portion just below the rim are formed approximately at uniform distances in the outer wall and the inner wall, circular through holes each having a particular diameter are formed at particular positions in the bottom portion, and elongated end portion side through holes each having a particular width and a particular length are provided vertically to an axial direction of the bottom portion, in both ends of the bottom portion.
