an electric press with dust generation preventing device , especially used in a clean spaced room , is disclosed , wherein the electric press has the essential elements including a pressing ram , an electric drive motor and a transmission provided between the drive motor and the pressing ram and transmitting the driving force of the drive motor to the pressing ram to reciprocatingly move the ram relative to a work to be pressingly processed , the electric press substantially comprises a casing structured airtight for covering the essential elements , an pipe elongated and having one end thereof being located within the casing and the opposite end being located in an open air outside of the clean spaced room and an air absorbing means provided in connection with said pipe and operated to cause the air in the casing to flow through said pipe out into the open air outside of the clean spaced room .