The invention discloses a lock device with a light-emitting indicator. The lock device comprises a lock and the light-emitting indicator, wherein the lock comprises a lock tongue and a pushing handle which can be pushed for enabling the lock tongue to move and form an accommodating slot. The light-emitting indicator is arranged in the accommodating slot, and comprises a light-emitting unit, a magnetic positioning unit, a battery unit and a light transmission indicating part. The light-emitting unit comprises a mounting base and at least one light-emitting element arranged on the mounting base. The magnetic positioning unit is used for positioning the mounting base onto the pushing handle of the lock. The battery unit comprises at least one battery used for driving the light-emitting element to emit light. The light transmission indicating part is arranged to cover the light-emitting element, and can display indication by virtue of light reflected by the light-emitting element. Through the light-emitting indictor, the lock device has the effect of emitting light to indicate while in dark, so that a set position of the lock device can be immediately known.