Abstract: A tin opener intended for opening a tin by wholly or partially cutting away a part of the tin from the remainder. The actual cutting operation is effected by a cutter roll which can be rotated about an axis of rotation and which during the cutting operation is rotated by a drive shaft via a driving gear-wheel and a gear-wheel. During the cutting process the tin is supported by a feed roll which is in driving engagement with the tin and secured to the drive shaft. In order to enable a tin which is to be opened to be introduced between the cutter roll and the feed roll, or to enable a tin which has been opened to be removed therefrom, the cutter roll is mounted in such a way as to be capable of being rotated about a second axis away from the axis of the drive shaft and the feed roll. The mounting is such that the axis of rotation is inclined in relation to the other axis and extends at a distance from the latter.