A method for isolating bast bark and wood bodies from a bast plant stem (18), whereby the bast plant stem (18) is formed internally by an essentially cylindrical wood body (9), and the wood body (9) is radially covered by a bast bark (3c) containing bast fibers, and is connected to the bast bark (3c) via a meristem tissue (11), which intends that the bast bark (3c) is separated by means of a tensile force (Fz) from the wood body (9), or at least from a constituent part of the wood body (9) through the division of the meristem tissue (11).