A FinFET device and a method for manufacturing the same. The FinFET device includes a plurality of fins each extending in a first direction on a substrate; a plurality of gate stacks each being disposed astride the plurality of fins and extending in a second direction; a plurality of source/drain region pairs, respective source/drain regions of each source/drain region pair being disposed on opposite sides of the each gate stack in the second direction; and a plurality of channel regions each comprising a portion of a corresponding fin between the respective source/drain regions of a corresponding source/drain pair, wherein the each fin comprises a plurality of protruding cells on opposite side surfaces in the second direction.