A pencil sharpener is disclosed. The pencil sharpener comprises: a housing part which has an accommodation space thereinside with an open portion formed on one side thereof, and in which a first coupling member is formed on an inner side surface thereof; and a pencil sharpening part which is inserted into the accommodation space of the housing part, has a second coupling member corresponding to the first coupling member formed on an outer side surface thereof, and has a knife blade part thereinside, wherein a pencil, which is inserted into the pencil sharpening part, is sharpened by the knife blade part as at least one area of the pencil sharpening part is rotated by the first coupling member and the second coupling member as a pencil, which is inserted into the pencil sharpening part, makes a straight-line motion in the lengthwise direction of the housing part.

An electric pencil sharpener includes a power device. The power device is connected to two rotatable rubber wheels by a transmission mechanism. The two rubber wheels are located on two sides of the pencil to be sharpened, are rotated in opposite directions and closely fit a side wall of the pencil to be sharpened, to push upwards or downwards the pencil to be sharpened to move. A gap between the two rubber wheels is adjustable. The electric pencil sharpener further includes a rotatable cutter carrier assembly located below the rubber wheels configured to sharpen the pencil to be sharpened. The electric pencil sharpener can sharpen the pencil of different diameters, and has a sharpening process requiring no human participation, has a wide application and saves manual operation.

An electric pencil sharpener includes a power device. The power device is connected to two rotatable rubber wheels by a transmission mechanism. The two rubber wheels are located on two sides of the pencil to be sharpened, are rotated in opposite directions and closely fit a side wall of the pencil to be sharpened, to push upwards or downwards the pencil to be sharpened to move. A gap between the two rubber wheels is adjustable. The electric pencil sharpener further includes a rotatable cutter carrier assembly located below the rubber wheels configured to sharpen the pencil to be sharpened. The electric pencil sharpener can sharpen the pencil of different diameters, and has a sharpening process requiring no human participation, has a wide application and saves manual operation.