A solution for wood preservation is suitable for preservation of wood against wood pests (fungi, insects, termites) that increases resistance of wood against biotic and abiotic factors of decay. The solution for wood preservation comprises an aqueous solution of amine, copper salt, boron salt, quaternary ammonium compound, and carboxylic acid. Preferable embodiment is a solution for wood preservation, consisting of ethanolamine, copper (II) sulphate, disodium octaborate tetrahydrate, alkylbenzyldimethyl ammonium chloride, and octanoic acid dissolved in water. This composition may result in improved copper fixation (decreased leaching of active ingredients from wood during weathering) and improved resistance against the most important wood destroying organisms like wood decay fungi, insects and termites.