A content playback information estimation apparatus, for estimating a state on playback of content, that is provided between a distribution server and a terminal in a system in which the distribution server distributes the content to the terminal via a network and the terminal plays the content, the content playback information estimation apparatus including: a unit configured to obtain packet data distributed from the distribution server to the terminal and to store the packet data in a storage unit; a unit configured to estimate a data amount in a buffer of the terminal based on obtained packet data; and a unit configured to estimate a state on playback at each time of the content in the terminal by comparing the estimated data amount with a predetermined threshold.