A generic developing case, which comprises a developer cabin with a case body, a cover, a stirring device in the developer cabin supporting the relative sidewall, a supply developer roller in the outlet of the developer cabin supporting the relative sidewall, a developer roller for contacting the supply developer roller, a guide apparatus and locking apparatus which the developer case can enter and fetch the sensitive drum box. The utility model is characterized in that a active driven position capable of rolling or moving to the relevant position in the roller end gear groups out the case body sidewall, which resolves the problem of make different power output identify with special developer case, can be compatible with all laser printer, copier, and facsimile apparatus, and can ensure a good print quality.