To provide a dynamic fantastic luminous decoration device by using a two liquid fluorescent liquid having relatively strong luminescent force.

A decoration device consists of a fluorescent liquid container 1 in which an oxidizing solution 1a containing an oxidizing agent and a fluorescent liquid 1b containing a fluorescent material are separately sealed, a pressing means for pressing the fluorescent liquid container 1 with air expanded by a combustion unit 2c, and a decoration part 3 in which a hollow tube 3a is put closer to the bottom of the fluorescent liquid container 1 and a molding body 3b formed with a hollow translucent material is arranged at the tip of the hollow tube 3a. A process for forming the molding body imitating a petal or the like comes up on the surface in the luminous state by the flow of the fluorescent liquid.