To provide a speaker enclosure in which excellent acoustic characteristics, simple arrangement, low cost, and the like, are satisfied.

The speaker enclosure in which the back surface of a speaker unit 31 faces the inner back surface of the enclosure (inner surface of a back plate 12) through a space is provided with a straightening lattice 14 for attenuating a reflection sound generated in the enclosure and the straightening lattice 14 is disposed in the space between the back surface of the speaker and the inner back surface (inner surface of the back plate 12).