Abstract: A carton knife for opening a carton includes a body member and a blade supported by the body member. The blade has a cutting surface and a cutting edge disposed thereon, the cutting surface and the cutting edge being adapted for cutting movement through the carton during operative engagement of the knife with the carton. A guide is disposed on the body member and is adapted to engage and slide along an edge of the carton to maintain the knife at a predetermined orientation relative the carton during the operative engagement, in which the cutting surface is disposed at an oblique angle relative the edge of the carton. The oblique angle serves to maintain a leading portion of the cutting edge closer than a trailing portion to the edge of the carton. Advantageously, during cutting, the blade is biased towards the edge of the carton and thus away from product inside the carton. Moreover, the orientation of the blade generates a force vector towards the edge during cutting for improved tactile sensitivity.