Abstract: A ramp for stairways is constructed from a plurality of separate right triangular modules which individually nest in the recesses of the stairway formed by the step treads and risers. The several modules are securely releasably interconnected on opposite sides thereof by tethered locking pins received by registering locking apertures of male and female connector elements. The continuous stairway ramp formed by two parallel groups of modules is laterally adjustable through connector slides on the riser walls of the modules. Two parallel ramp trackways are formed having opposite side upstanding lips and the surfaces of the trackways are covered with a grooved rubber matting to facilitate the passage of hand trucks and wheelchairs smoothly along the ramp.