A jitter buffer control apparatus has a buffer for storing data included in an input packet transmitted from a telecommunications network, and a jitter buffer controller for controlling the buffer to store the input data into the buffer and take out the stored data from the buffer on the basis of a sequence number included in the input packet in a processing period. When under-running occurs in the buffer, the jitter buffer controller stores input data into the buffer with a storage location skipped which corresponds to the processing period associated with packet loss due to the under-running.