A photoacoustic diagnosis device that diagnoses a state of a skin of a human body, includes a pulsed light source, an electric signal converter, a blood distribution obtaining section, and a diagnosis section. The pulsed light source generates a pulsed light. The electric signal converter receives a photoacoustic wave generated at the skin by the pulsed light and converts the photoacoustic wave into an electric signal. The blood distribution obtaining section obtains distribution of blood in the skin based on the electric signal. The diagnosis section diagnoses a state of the skin based on a result obtained by the blood distribution obtaining section.
