A capsule for a tooth restorative material for directly administering a mixed and kneaded material obtained by mixing and kneading the tooth restorative material constructed by two components of previously weighed fixed amounts of a powder component and a liquid component in an inner portion, to a position to be restored in a tooth of a patient is structured such as to prevent generation of a bursting sound at a time of starting the administration. A protrusion portion (4c) having its inner end positioned slightly inside an outer periphery of a circular hole of a first opening forming portion (1b) is provided on a rear end portion of a nozzle (4).
