Therapeutic roller apparatus including at least two easily interchangeable elongated, semi-cylindrical component assemblies, each formed by a rigid substrate component having a concave inner surface and a convex outer surface, and a resilient pad component affixed to and covering the outer surface of the rigid substrate part. The side edges of the component assemblies are adapted to mate together to form a cylindrical roller body having a first outer diameter. The roller body ends are provided with first latch elements. A pair of cylindrical end caps, each having an outer diameter greater than the roller's first outer diameter, and an inner diameter adapted to mate with and capture an end of the assembled roller body. The end caps include second latch elements adapted to lockingly engage the first latch elements and secure the entire assembly together. In use, all user weight applied to the roller body is transferred to the end caps.