Abstract: An interlocking building block, to be used in constructing walls and building frames, the building blocks being adapted to be securely engaged without the need to use extra layers of cement. The interlocking building blocks include a series of ridges and channels disposed along the top and bottom surface of the block and at opposite distal ends, which are structured and disposed to be correspondingly fitted with the ridges and channels of adjoining blocks, thereby forming a secure interlocking structure.