PROBLEM TO BE SOLVED: To provide a blood vessel detecting apparatus which detects blood vessels regardless of their subcutaneous depth, easily discriminates the blood vessels which vary in subcutaneous depth, and displays them.SOLUTION: A blood vessel detecting apparatus includes: a reflection type blood vessel detecting light source 1 which irradiates light for the reflection type detection of blood vessels a transmission type blood vessel detecting light source 2 which irradiates light for the transmission type detection of blood vessels an imaging unit 3 which detects the back-scattered light having passed through an object to be detected of the back-scattered light of the light irradiated by the reflection type blood vessel detecting light source 1 and the forward-scattered light having passed through the object to be detected of the forward-scattered light of the light irradiated by the transmission type blood vessel detecting light source 2, and which outputs a reflection type captured image signal 5a based on the detected back-scattered light and a transmission type captured image signal 5b based on the detected forward-scattered light a control unit 4 which controls the switching of the reflection type blood vessel detecting light source 1 and the transmission type blood vessel detecting light source 2, and which outputs switching operation information a signal processing unit 5 which discriminates blood vessels according to their subcutaneous depth by using the reflection type captured image signal 5a, the transmission type captured image signal 5b, and the switching operation information and a display unit 6 which displays the blood vessels by discriminating among them according to their subcutaneous depth.COPYRIGHT: (C)2014,JPO&INPIT【課題】皮下深度に関わらず血管を検知し、皮下深度の異なる血管を簡易に弁別して表示する血管検知装置を提供する。【解決手段】反射型血管検知用の光を照射する反射型血管検知用光源1と、透過型血管検知用の光を照射する透過型血管検知用光源2と、反射型血管検知用光源1が照射した光の後方散乱光のうち検知対象を通過した後方散乱光と、透過型血管検知用光源2が照射した光の前方散乱光のうち検知対象を通過した前方散乱光とを検知し、検知した後方散乱光に基づき反射型撮像画像信号
