The two attacks took place in the southeastern Diffa region near the border with Nigeria, according to a military statement released late Tuesday.
Five of them were killed in an ambush on Monday morning carried out by "members of the Boko Haram terrorist group" which also left six others wounded.
In an earlier incident on Sept. 8, two soldiers were killed and another two wounded when their patrol vehicle went over "an improvised explosive device," the statement, reported by AFP, said.
Earlier this month, five villagers were killed and two others wounded in the same area in another attack by the Nigeria-based extremist group in the first such incident since early June.
Boko Haram's seven-year insurgency has left at least 20,000 people dead in Nigeria and border areas of neighboring Niger, Chad and Cameroon, and made more than 2.6 million homeless