Hans-Ulrich Rieker (1 February 1920 – 26 October 1979) was a German actor, author, and leader of the Buddhist religious order Arya Maitreya Mandala in Europe.

[1] Deeply affected by Buddhism, he was ordained a novice monk in the Berlin Buddhist Temple in 1950.

He built up the order in Europe and headed this branch for twelve years until progressive deafness caused him to withdraw from public life.

[3] Rieker gave radio lectures on RIAS on topics of Buddhism as well as Indian and Chinese philosophy.

His books on Buddhism, yoga and meditation contributed to the growing interest in these subjects in Germany in the 1950s and 1960s.