A sunglasses having a simulated monolithic lens is disclosed. It comprises a shaded optical lenses assembly having two shaded optical lenses, each of the two shaded optical lenses having a connecting segment on a side thereof for correspondingly connecting to each other and an insertion segment extended from the connecting segment; a frame having an assembling groove disposed on the bottom edge thereof to engage upper edges of the shaded optical lenses for positioning; and a nose pad having a slot to correspondingly engage with middle lower edges of the shaded optical lenses assembly and a socket disposed on the slot for tightly accommodating the two insertion segments so as to stably connect the two shaded optical lenses and to form the sunglasses with a simulated monolithic lens.