A process for keycaps includes the steps of: providing a light-transmitting material; making the light-transmitting material into a keycap body, the keycap body having a light-entering surface, one side of the light-entering surface extending to form a light-exiting surface intersecting with the light-entering surface, a connecting surface being formed between the light-entering surface and the light-exiting surface; and coating a light-shielding layer on the connecting surface to form a light-reflecting surface in the light-shielding layer. Via the above process, a keycap that guides light laterally can be obtained.