The invention discloses a cutting device and scissors. This cutting device is provided with a support shaft, a first blade body which holds the support shaft, a rolling bearing which is mounted on thesupport shaft and which comprises an outer race and an inner race, a second blade body which is provided so as to overlap the first blade body and which is rotatably supported on the support shaft with the rolling bearing interposed therebetween, a fixing member which is arranged on the side opposite of the first blade body and which, together with the first blade body, holds the rolling bearingof the support shaft from both sides, and a biasing member which is arranged between the rolling bearing and the fixing member. Of the outer race and the inner race, one rotates integrally with the second blade body and the other is biased by the biasing member towards the first blade body.