PROBLEM TO BE SOLVED: To improve an accuracy of determination of a tumor or the like, and to establish a novel diagnosis index about a tumor or the like, such as a progress of a tumor or the like and an invasion degree in a depth direction.SOLUTION: There is provided a photodynamic diagnosis apparatus 1 including: a light source 14 for generating a light pulse having a time width shorter than a fluorescence lifetime of a photosensitive medicine and a detector 15 for measuring a temporally changing waveform of the fluorescence caused by the light pulse.COPYRIGHT: (C)2014,JPO&INPIT【課題】腫瘍などの判定の精度の向上を図ること。腫瘍などの進行度や深方向への浸潤度など、腫瘍などに対する新規な判断指標を確立すること。【解決手段】光線力学診断装置1は、光感受性薬剤の蛍光寿命より短い時間幅の光パルスを発生することができる光源部14と、上記光パルスに対する蛍光の時間変化の波形を測定することができる検出部15とを備える。【選択図】図1