A powder compression molding machine structured so as to advance multiple inferior pestles (61) and superior pestles (41) into multiple through mortar holes (31) provided in first and second molding mortar sections (32, 33) of slide plate (3) in compression molding zone (21) to thereby conduct compression molding of powder and so as to slide the slide plate (3) and push the molded items downward to thereby recover the same in molded item discharge zone (22a, 22b). Even when powder is compression molded with low compressive force into a solid of high void ratio, not only can effective recovery of molded items be attained without breaking of the molded items but also there can be obtained molded items of satisfactory void ratio being easily dissolved in water, etc.本發明之粉體壓縮成形機係構成為，於壓縮成形區21中，使多數個下杵61及上杵41進入於滑動板3的第1、第2成形臼部32、33上所設置之多數個貫通臼孔31，而將粉體予以壓縮成形，使滑動板3滑動並於成形物排出區22a、22b中將成形物往下方壓出而予以回收。；即使於以低壓縮力將粉體壓縮成形為具有較大空隙率的固體之情況下，亦不會使成形物破裂而能夠良好地進行成形回收，因此可獲得具有充分的空隙率之容易溶解於水等之成形物。
