Abstract: An elevator car call register apparatus and a method thereof, which relates to processing a car call which a passenger registers in an elevator car and in which a plurality of call buttons of a multiple of 10 and a plurality of call buttons of a single digit are separately provided, is capable of controlling calls for a large number of floors with a plurality of call buttons having the smaller number than the number of floors. When a passenger presses a call button of a multiple of 10 and a call button of a single digit, the apparatus according to the present invention stores each data generated in accordance with calls of the multiple of 10 and the single digit in a memory in a predetermined format, when the passenger presses a set button, the apparatus determines that the call for a desired floor is normally performed, and combines the data stored in the memory, and outputs to a car controller, thus enabling the elevator car to move to the desired floor.