Giovanni Francesco Maineri or Gianfrancesco de' Maineri (active 1489–1506) was an Italian painter of the Renaissance, active in Ferrara.
Putatively born in Parma to a painter Pietro de Maineri.
He worked in Ferrara for the ruling Este family.
His style recalls that of the contemporary Ercole de' Roberti.
[1] Lorenzo Costa, another Roberti pupil, completed an altarpiece by Maineri, when the latter left for Mantua in 1498.