An arm rolling strip for sphygmomanometers includes an elastic first rolling strip and an elastic second rolling strip wrapping partially on the first rolling strip. The first rolling strip has an aperture holding an air nozzle communicating therewith. The second rolling strip has a guide track formed on the arched surface thereof relative to the air nozzle to restrict sliding of the second rolling strip on the arched surface of the first rolling strip. The arm rolling strip thus formed can be extended to fit an adults thicker arm or shortened to fit a childs thinner arm to provide much comfort and fitness to users when in use.
