Otakar Hollmann (29 January 1894 – 9 May 1967) was a Czech pianist who was notable in the repertoire for left-handed pianists. Although little known now, he was considered second only to Paul Wittgenstein in the promotion of the left-hand repertoire. He commissioned works for the left hand from a number of composers, most notably Janáček, Martinů, Schulhoff and Foerster. He was also a composer in his own right.