PROBLEM TO BE SOLVED: To provide an electronic sphygmomanometer capable of closely attaching a cuff just by inserting an upper arm and easily and accurately measuring a blood pressure.SOLUTION: The electronic sphygmomanometer 1 for measuring the blood pressure at the upper arm T includes an air bag 14, a display part 31 for displaying a blood pressure value, and a body part 10, wherein the air bag 14 is housed in the body part 10 provided with the display part 31. The air bag 14 is formed into a spiral belt body with a backing material 15, a wire 12 being a wire rod is fixed to the side of the end part 14A of the air bag 14, an automatic winding part 13 for automatically winding the wire 12 is provided, and the end part 14A of the air bag 14 and the other end part 14B of the air bag 14 are held by the wire 12 to overlap with each other.COPYRIGHT: (C)2011,JPO&INPIT【課題】上腕を挿入するだけでカフを密着させて容易にしかも正確に血圧測定を行うことができる電子血圧計を提供する。【解決手段】空気袋14と、血圧値を表示する表示部31と、本体部10と、を有し、空気袋14は、表示部31を備えた本体部10に収納され、上腕Tで血圧を測定する電子血圧計1であって、空気袋14は、バッキング材15で渦巻状の帯体に形成されており、空気袋14の端部14A側に線材であるワイヤー12を固定し、ワイヤー12を自動で巻き取る自動巻き取り部13を備え、空気袋14の端部14Aと空気袋14の他の端部14Bとが重なり合うようにワイヤー12により保持されている。【選択図】図3