Provided are an apparatus and a method for processing a bell sound in a wireless terminal capable of controlling a volume of sound source samples as the bell sound is played. According to the method, a plurality of notes, volume values, volume interval information, and note play times are extracted from inputted MIDI file. After the number of volume samples for each step is computed using the extracted volume value and the volume interval information, a volume of the sound source samples that correspond to a note that is to be played is controlled in advance using the number of the volume samples. Next, the sound source samples are converted using a frequency given to the notes and outputted, whereby a system load due to the real-time play of the bell sound can be reduced.