An organic core material including a first layer having a first fiber cloth and a first resin layer formed from a first resin component and having the first fiber cloth embedded therein, and a second layer having a second fiber cloth and a second resin layer formed from a second resin component and having the second fiber cloth embedded therein. The organic core material has a laminated structure including the second layer, a plurality of the first layers, and the second layer in order, and a content percentage of the second resin component based on a mass of the second resin layer is higher than a content percentage of the first resin component based on a mass of the first resin layer.