A rubber pad for an electronic percussion instrument is produced by integrally forming together a pad portion (including a striking surface) and a rim portion, which are colored differently in two-colored formation. In manufacture, the rubber pad is produced by a single press formation using a specially designed metal mold in which a partition wall is arranged between a pad forming cavity and a rim forming cavity, into which rubbers of different colors are respectively put. Therefore, a groove corresponding to the partition wall is formed in a boundary between the pad portion and rim portion, which are integrally interconnected together and are colored differently. Due to the provision of the groove, it is possible to reliably separate different colored regions, i.e., the pad portion and rim portion, from each other. Thus, it is possible to improve external appearance of the rubber pad without substantially deteriorating durability thereof.