To provide a sensory information acquisition device suited for miniaturization and for space savings and to enhance detecting accuracy in a fine region.

In a sensory information acquisition device, a recognition means 1 for recognizing stimuli comprises a storage part 3, a signal source 4, and a detecting part 5. A fluid 2 whose physical properties are varied by stimuli (pressure, heat, ultraviolet radiation) is sealed in the storage part 3, and when an optical signal or an electric signal is supplied to the fluid 2 from the signal source 4, optical (light transmission, color, etc.), or electrical (electrostatic capacity, etc.) changes of the fluid 2 are detected by the detecting part 5.