A rotary table bearing device (1) is provided for supporting a rotary table in a rotatable and axially fixed manner with respect to a stationary frame by a roller bearing. In order to develop a rotary table bearing device (1) simply and with a high load rating, the roller bearing is formed by a single planetary roller bearing (2). The single planetary roller bearing (2) has two bearing rings (3, 4), one of which is associated with the frame and the other of which is associated with the rotary table and which have grooved profiles (7, 8), and planetary rolling elements (10), which are arranged in such a way that the planetary rolling elements are distributed over the circumference and have an outer profile (11) that is complementary to the grooved profiles (7, 8).