Provided is a technology for imparting a design having a higher degree of freedom than in the related art to a composite material product including a woven fabric, which is formed of a thread made of a specific fiber (carbon fiber, glass fiber, aramid fiber), and a resin. As a first step, a specific fiber cloth (100), which is the woven fabric formed of the thread made of a specific fiber, and a backing sheet (200) formed of a thermoplastic resin are stacked. Subsequently, embroidery is performed with an embroidery thread (300) to form a design on a front surface of the specific fiber cloth (100). The embroidery thread (300) is made of the specific fiber, and penetrates through the specific fiber cloth (100) and the backing sheet (200). Then, the specific fiber cloth (100) and the backing sheet (200) are sandwiched between resin sheets (400) each formed of a thermoplastic resin, and the whole is cured by an RFI method.