Underground waste container device, comprising: - a lower housing intended to be at least partially placed in the ground and having an upper opening, - a waste container which can be placed into and extracted from the lower housing through the upper opening, - a cover platform for opening and closing the upper opening, - an insertion column mounted on the cover platform and having an insertion aperture and a passage channel extending from the insertion aperture through the cover platform, such that garbage inserted through the insertion aperture falls through the passage channel into the waste container inside the lower housing, - a lid connected to the insertion column and movable in an open position away from the insertion aperture and in a closed position covering the insertion aperture, - a pedal arranged to be accessible by a user's foot from a front side of the insertion column near the cover platform, and a lid actuating mechanism connected between the pedal and the lid such that actuation of the pedal moves the lid in the open position and release of the pedal automatically moves the lid back in the closed position, wherein the lid actuation mechanism is arranged inside an external housing of the insertion column and inaccessible during use of the device, characterized by further comprising: - a safety platform connected to the lower housing and movable from a rest position away from the upper opening and not interfering with the waste container inside the lower housing, to a work position covering the upper opening, and - a safety lock for locking the safety platform in the work position and releasing it therefrom, wherein the safety lock comprises at least one foot actuated member arranged to be accessible by an operator's foot near an edge of the upper opening, in which the safety lock comprises at least one latch member connected to the lower housing in a position adapted for engaging the safety platform in the work position and movable from a release position to a locking position and vice versa, said latch member forming a lower bar and an upper bar shaped to embrace a free edge of the safety platform both from below and from above when the latch member is in the locking position and to withdraw completely from the safety platform when the latch member is in the release position. - a lower housing intended to be at least partially placed in the ground and having an upper opening, - a waste container which can be placed into and extracted from the lower housing through the upper opening, - a cover platform for opening and closing the upper opening, - an insertion column mounted on the cover platform and having an insertion aperture and a passage channel extending from the insertion aperture through the cover platform, such that garbage inserted through the insertion aperture falls through the passage channel into the waste container inside the lower housing, - a lid connected to the insertion column and movable in an open position away from the insertion aperture and in a closed position covering the insertion aperture, - a pedal arranged to be accessible by a user's foot from a front side of the insertion column near the cover platform, and a lid actuating mechanism connected between the pedal and the lid such that actuation of the pedal moves the lid in the open position and release of the pedal automatically moves the lid back in the closed position, - a safety platform connected to the lower housing and movable from a rest position away from the upper opening and not interfering with the waste container inside the lower housing, to a work position covering the upper opening, and - a safety lock for locking the safety platform in the work position and releasing it therefrom, wherein the safety lock comprises at least one foot actuated member arranged to be accessible by an operator's foot near an edge of the upper opening,