Abstract: A modular building component made of solid wood, capable of being fitted onto other correspondingly shaped modules to provide a wall of a building. The module includes a core made of horizontally laminated wood with a lengthwise groove cut along the top and vertically at one end for utility purposes, to which side boards are attached in a manner which allows each module to lock into adjoining modules both vertically and horizontally. The upper edges of side boards are attached a short space from the top of the core, the lower edges extending past the bottom of the core, creating both a male and female fitting for adjoining modules. In the same manner side boards are offset a short space from one end of the core and extend past the core at the opposite end to allow the ends of modules to lock as well. The side boards are attached at the factory with adhesive bonding material and secured with fasteners.