A day before lawmakers debate the controversial issue, Ursula von der Leyen told today's edition of the Sueddeutsche Zeitung newspaper that she backed Germany having the option of drones capable of being armed if deployments were approved by parliament.
According to the pre-released comments, she said that in the case of a mission, parliament would be able "to decide on the question of arming the drones for the protection of the troops sent ... Based on the concrete case".
The issue of drones has long generated an ethical debate in Germany, which does not use unmanned aircraft to fight battles but only for surveillance and reconnaissance missions in places such as Afghanistan.
Von der Leyen, who took over the portfolio under Chancellor Angela Merkel's "grand coalition", said she believed Germany had to join European efforts to develop drones capable of being armed.
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"For such a project, that takes at least a decade, we will now look for partners," she told the newspaper.
Germany currently leases Israeli Heron reconnaissance drones.
Last year Von der Leyen's predecessor, Thomas de Maiziere, also called for combat drones to be incorporated into the air force, saying their lack created a disadvantage.