A foldable portable terminal device provided with a first housing includes a display unit, a speaker and a speaker sound hole, a second housing, and a hinge unit that couples the housings rotatably around two directions that perpendicularly intersect with each other. The device is configured such that coupling of the first housing and the hinge unit is coupled to a second rotary shaft of the hinge unit at a position closer to a surface having the speaker sound hole than a midpoint in a cross-section in a thickness direction of the first housing, and that a gap formed in a folded state in which the first housing is overlaid on the second housing with a surface having the speaker sound hole facing inside is greater than a gap formed in the folded state with the surface having the speaker sound hole facing outside.