An electrostatic speaker includes: a first electrode formed of a sheet-like member, having a first face including a protrusion and a second face opposite the first face, and having conductivity and flexibility; a second electrode formed of a sheet-like member, disposed so as to be opposed to the second face, and having conductivity and flexibility; and an oscillator formed of a flexible sheet-like member, and disposed between the first electrode and the second electrode, at least one face of which has conductivity.