The relationship between the reflectivity and the photoacoustic signal magnitude was examined at various solid-liquid interfaces by changing the angle of incidence in total internal reflection photoacoustic spectrometry (TIR-PAS). On the basis of a theory for the photoacoustic signal generation, the relationships could be explained with respect to the glass-dye solution and glass-ITO (Indium-tin oxide) film-dye solution interfaces. In addition, photoacoustic signals arising from surface plasmon-polaritons were observed at the glass-gold film-dye solution interfaces. From these findings, it has been shown that both of optical and thermal properties of the solid-liquid interfaces can be studied by means of TIR-PAS.