Building block, as well as an insert piece to be applied in such a building block

A building block for construction of walls and partitions of a building or the like extending in a longitudinal direction, the building block comprising:

• a coupling having a first coupling part protruding from a first surface of the building block and a complementary second coupling part on an opposite surface of the building block,
• whereby the first coupling part and the second coupling part are complementary and whereby, during assembly of a plurality of the building blocks, the first coupling part of a first building block and the second coupling part of an adjacent building block can work together to couple the building blocks,
• wherein the building block is provided with a body in which one or more insert pieces are inserted, whereby the first and second coupling parts are formed of said one or more insert pieces, whereby the first coupling part and the second coupling part are complementary in a way that, after adjacent building blocks have been coupled, the coupled building blocks are connected together causing the couplings of stacked building blocks to work in conjunction with one another,
• wherein the insert piece of the building block can be coupled with an insert piece of an adjacent building block by longitudinally moving a spaced apart pair of inward hook-shaped teeth of a foot of the first coupling part associated with a first building block into engagement with spaced apart longitudinal groove sections in a head of the second coupling part associated with an adjacent building block.