Inducing magnetic moments in graphene is very important for its potential application in spintronics. Introducing sp³-defects on the graphene basal plane is deemed as the most promising approach to produce magnetic graphene. However, its universal validity has not been very well verified experimentally. By functionalization of approximately pure amino groups on graphene basal plane, a spin-generalization efficiency of ~1 μB/100 NH₂ was obtained for the first time, thus providing substantial evidence for the validity of inducing magnetic moments by sp³-defects. As well, amino groups provide another potential sp³-type candidate to prepare magnetic graphene.