Olaf Christian Stæhr-Nielsen was a Danish sculptor born on September 25, 1896, in Frederiksberg. He died on May 24, 1969, in Copenhagen. He was married to Eva Stæhr-Nielsen.

Stæhr-Nielsen was a student in Einar Utzon-Frank's first class. He executed numerous decorative works for public buildings, cinemas, exhibitions, and commercial properties. He collaborated with architects such as Kaj Gottlob, S.C. Larsen, Tyge Hvass, Fr. Larsen, Frits Schlegel, and Aage Rafn on these projects.

Stæhr-Nielsen's works included reliefs in metal plates and ceramics, intarsia walls, and reliefs in wood. He created several ceramic works in collaboration with the Saxbo stoneware factory in Copenhagen, where his wife worked as a designer.

Stæhr-Nielsen's contributions to the field of sculpture in Denmark were significant. His works can be seen in various public spaces, including public buildings, museums, and galleries.

Olaf Stæhr-Nielsen is buried in Vestre Cemetery, Copenhagen. His legacy lives on, and his works continue to inspire and influence generations of artists and sculptors in Denmark and beyond.