Most of rice husks are disposed as industrial waste because utilization of rice husk is minimal and burning is prohibited in many prefectures in Japan. This study aimed to evaluate the mechanical and physical properties of particleboard formed from rice husk particles by hot pressing with a polyvinyl alcohol (PVA) binder. A preform was prepared using mixed rice husk particles, PVA powder, and purified water. The rice husk particleboard was fabricated by hot pressing with the preform. Some mechanical (flexural strength and flexural modulus) properties and physical (thickness swelling and water absorption) properties of the resulting particleboard were evaluated. Results showed that mainly, the water absorption decreased with increasing the density of the rice husk particleboard. However, the thickness swelling increased with increasing the density of the rice husk particleboard. The flexural strength and flexural modulus of dried rice husk particleboard increased with increasing the density. On the other hand, in the case of wetted rice husk particleboard, the flexural properties decreased significantly over the density of 0.8 g/cm³.