A pulse wave propagation time measuring device (1) includes a first photoelectric pulse wave sensor (10) having a first light emitting element (11) and a first light receiving element (12) and detecting a first photoelectric pulse wave signal. And a second photoelectric pulse wave sensor (20) having a second light emitting element (21) and a second light receiving element (22) for detecting a second photoelectric pulse wave signal. The first photoelectric pulse wave sensor (10) and the second photoelectric pulse wave sensor (20) are arranged on one contact surface (1a) that comes into contact with the body when worn. The distance between the second light emitting element (21) and the second light receiving element (22) is set shorter than the distance between the first light emitting element (11) and the first light receiving element (12), and the second photoelectric pulse wave sensor ( 20) detects a second photoelectric pulse wave signal corresponding to the blood flow of the capillary blood vessel, and the first photoelectric pulse wave sensor (10) is located deeper than the capillary blood vessel and has a blood flow of an artery thicker than the capillary blood vessel. A first photoelectric pulse wave signal corresponding to is detected.脈波伝播時間計測装置（１）は、第１発光素子（１１）と第１受光素子（１２）とを有し第１の光電脈波信号を検出する第１光電脈波センサ（１０）と、第２発光素子（２１）と第２受光素子（２２）とを有し第２の光電脈波信号を検出する第２光電脈波センサ（２０）とを備える。第１光電脈波センサ（１０）および第２光電脈波センサ（２０）は装着時に身体と接触する一の接触面（１ａ）上に配置される。第２発光素子（２１）と第２受光素子（２２）との間隔は第１発光素子（１１）と第１受光素子（１２）との間隔よりも短く設定され、第２光電脈波センサ（２０）は毛細血管の血流に応じた第２の光電脈波信号を検出し、第１光電脈波センサ（１０）は、毛細血管よりも深い位置にあり毛細血管よりも太い動脈の血流に応じた第１の光電脈波信号を検出する。
