EN
The paper presents the results of research into relation between the lexemes 'mistrz' (master) and 'uczen' (apprentice or student). Some phrases (mój mistrz, mój uczen) and syntactic features suggest a kind of convertive relation. Both of the lexemes are - for example - a threeactant: 'ktos, czyjs, w jakiejs dziedzinie wiedzy (/sztuki) (someone, someone's, in a field of science (/art)). This feature is not sufficient to make a convertive relation. In Polish Language the 'mistrz-uczen' relation is a unilateral one. The relation depends on the apprentice who selects a master. The master confirms this only if 'uczen' (apprentice) is taught by the master and if the master is regarded by the apprentice as a skilled, knowledgeable person.