▎ 摘　　要

We present the solutions of the energy spectrum of charge carriers confined in a quantum ring in ABA-stacked trilayer graphene subjected to a perpendicular magnetic field. The calculations were performed in the context of the continuum model by solving the Dirac equation for a zero width ring geometry, i.e., freezing out the carrier radial motion. We show that the obtained energy spectrum exhibits different symmetries with respect to the magnetic field and other parameters. Moreover, the applied potential shifts the energy spectrum vertically while the applied magnetic field breaks all symmetries. We compare our results with those of the ideal quantum ring in monolayer and bilayer graphenes.