The present disclosure relates to a cantilever sensor, and a biosensor having the same, wherein the cantilever sensor including a slit formed on a flat board and a cantilever formed by the slit, a first electrode formed on the cantilever, and a second electrode formed on the flat board countered to the first electrode about the slit, wherein the electrodes are formed on the cantilever sensor having the slit, whereby sensing can be conducted by an electric method, through which the sensor can be effectively miniaturized.