PURPOSE: To produce a powder sintered product with high production efficiency by compressing raw material powder to prescribed density by a wet press method and cutting equally the resulting molding to a desired height in the direction orthogonal to the compressing direction then sintering the molding.

CONSTITUTION: Raw material powder such as ferrite or the like is loaded into the space part 8 formed of a lower punch 2 constituting a male die fixed onto the base plate 1 of a wet press device and a femal die 4 and an upper punch 5 mounted with a filter 9 to an upper plate 3 is lowered by a hydraulic cylinder 6 to press and dehydrate the powder by which a powder molding is obtd. The raw material powder is compressed 50W65% of the theoretical density at the height above the molding height adding an allowance for cutting to at least two- fold the height of the molding equivalent to the required height of the sintered product and below 50mm. The molding obtd. in such a way is equally cut to the height equivalent to the required height of the sintered product in the direction orthogonal with the compressing direction and is then sintered.