Keycap

A keycap, comprising:

• a lower plate, having at least two engaging holes recessed inwardly from an upper surface of the lower plate and separated from each other;
• and
• an upper cover, configured to be detachably assembled on the lower plate, wherein the upper cover has at least two buckle members disposed on a bottom surface of the upper cover and respectively corresponding to the at least two engaging holes, and each of the buckle members has two buckle portions separated from each other, and each of the buckle portions having an inner arc and an outer arc has a protrusion protruding laterally outward, and each of the protrusions having an outer arc edge is configured to engage a portion of the corresponding engaging hole and has an arcuate abutting wall extending along the outer arc edge and away from a lower surface of the buckle portion, and each of the engaging holes has a lower sloping surface configured to face the arcuate abutting wall after the upper cover is assembled on the lower plate.