To absorb low frequency sound by simple structure change, in a plate-film vibration sound absorbing structure (a sound absorbing structure for performing plate vibration or film vibration).

The sound absorbing structure forms the plate-film vibration sound absorbing structure by a case and a vibration object. In the sound absorbing structure, a partition wall including a hole section is provided in an inner space formed by the case and vibration object. When such a partition wall is provided, a resonance frequency falls off, and a peak value of frequency to be absorbed falls off, in comparison with architectures different from this (architectures of comparison examples 1 to 3).