The present invention relates to a prepreg comprising: a core material; a first resin material laminated on an upper portion of the core material; and a second resin material laminated on a lower portion of the core material. A contact interface of the first resin material and the second resin material is placed within a thickness range of the core material, and the first resin material and the second resin material comprise a photoinitiator or a curing booster. In addition, the first resin material has a higher content of the photoinitiator or the curing booster, higher curing degree or higher hardness than the second resin material.
