To provide a stable, and easy mass production method for a curved ceiling panel which does not sag down at its central portion during ceiling panel laying work.

A base material 2 for ceiling panel consisting of glass fiber plate or the like is loaded on a continuous conveyor 5, this surface is pressured with an adhesion roll 4, a surface skin material 3 is placed below the pressured portion and adhered. By releasing the pressuring force of the adhering roll 4, a restoring force or the like of the ceiling panel base material 2 acts and a curved ceiling panel 1 is produced. By attaching this ceiling panel 1 to a ceiling of a building or the like, the curve is eliminated by its deadweight and a flat ceiling panel 1 can be installed.