The grasping type pulse wave measuring device (1) is provided so as to project along the axial direction of the substantially spheroid body (10) and the body (10), and the user holds the body (10) When the stopper portion (11) which regulates the position of the thumb by hitting the side of the thumb, and formed in a substantially semi-cylindrical shape, an axis provided in parallel with the axial direction of the main body portion (10) (14) is disposed at a position offset along the circumferential direction of the main body (10) from the light shielding cover (13) attached pivotably and the rocking shaft (14) of the light shielding cover (13), And a photoelectric pulse wave sensor (20) for acquiring a photoelectric pulse wave signal.把持型脈波測定装置（１）は、略回転楕円体状の本体部（１０）と、本体部（１０）の軸方向に沿って凸設され、使用者が本体部（１０）を把持するときに、親指の側面に当たることによって該親指の位置を規制するストッパ部（１１）と、略半円筒状に形成され、本体部（１０）の軸線方向と平行に設けられた軸を揺動軸（１４）として揺動自在に取り付けられた遮光カバー（１３）と、遮光カバー（１３）の揺動軸（１４）から本体部（１０）の周方向に沿ってオフセットした位置に配設され、光電脈波信号を取得する光電脈波センサ（２０）とを備えている。
