To provide a corer for pulling out a cap and a core first and facilitating cutting thereafter, since it is troublesome and the time and labor are needed to cut off the respectively attached cap and core after cutting a tomato into round slices or semicircular shapes without taking off the cap and the core, and allowing coring of other fruit vegetables such as green peppers and kiwis with one device.

The corer mainly includes elements of: a thick cylindrical base shaft body (1) having a through-hole vertically penetrating a center part; a thin cylindrical turning body (2) to be slid on the outer side; a center shaft (3) to be slid in the through-hole of the base shaft body; and a thick cylindrical handle (4) fixed and connected to the front end area of the base shaft body.