The invention discloses a pen, belongs to the field of school supplies, and aims to fulfill the aim of bringing convenience to management. According to the technical scheme, the pen is of a mouse-like shape; ears of the mouse are provided with transparent adhesive tapes; a pencil lead is arranged inside the middle of the mouse; an eraser is arranged on the lower part of the mouse; compasses are arranged on the middle part of the mouse, are retractable when not in use, and serve as two feet of the mouse. Through adoption of the structure, during use of the mouse, the left ear of the mouse is controlled by the left eyebrow of the mouse, and the right ear of the mouse is controlled by the right eyebrow of the mouse, so that the transparent adhesive tapes can be grasped firmly; during use, the transparent adhesive tapes can come out by slightly pressing the eyebrows; a large quantity of pencil leads can be placed from small holes in the head by slightly pressing the mouse; the eraser can be placed inwards by opening a bottom cover on the lower part; the compasses are arranged on the middle part of the mouse, are retractable when not in use, and serve as two feet of the mouse. The pen is novel in design structure, has a good effect, and is easy to popularize.