Abstract: A powder sample forming apparatus includes: a guide table horizontally secured on a mounting table; an upper fixed board which is fixed to the guide table and arranged in parallel with the guide table with a certain distance apart above the guide table and has a transparent plate for metering in its approximate center; a slide block having a through-hole for holding a sample in its one end and disposed between the guide table and the upper fixed board so as to move back and forth within a sliding distance longer than the length of the upper fixed board; and a sample pressing device which is disposed under the guide table in a position of the transparent plate and presses a sample from the underside of the transparent plate.