To provide a compact absorption type analyzer adapted to the analysis of many components, and having high general-purpose properties and high measurement precision.

In the absorption type analyzer, including a light source part, a sample cell part and a plurality of detectors as constituent elements, a condensing member, is provided between the light source part, and one detector and a region for leading out a part of the light from the light source part, that is, a light lead-out port is provided to the inner wall surface of an optical member and the light led out of the light lead-out port is incident on the detector. Herein, the condensing member is preferably provided between the light source part and the sample cell part. Further, the optical element used for the other detector is provided to the light lead-out part to be arranged preferably in the close vicinity to the light path formed by the condensing member.