The invention relates to a hand grenade (1) with an active body (3) containing an active charge (2), and with an ignition device (4) that acts on a detonator (12) to ignite the active charge (2). In order to achieve this feature, after the hand grenade (1) has been thrown the ignition can be triggered without delay if the tactical situation requires it, and no danger arises for the shooter if the hand grenade (1) with the safety device released is dropped accidentally. The invention pertains to an electronic ignition system composed of an ignition trigger (6) and a fuze (8) used as the ignition device (4), whereby the ignition trigger (6) remains with the shooter when the hand grenade (1) is thrown and the hand grenade (1) can be ignited by wireless only when the shooter activates an ignition trigger element (11) of the ignition trigger (6).