Аннотация:The paper is aimed at providing a typological survey of indirect question (IQ) markers in languages of the world. The sample of 30 languages has been examined, and 89 IQ markers have been identified and classified into the following groups: null strategy (asyndetic construction); quotative markers; subordinators, including complementizers, relativizers and adverbial clause markers (conditionals and concessives); question particles; disjunctive particles and conjunctions; two-predicate complexes; oblique mood markers and focus marking devices. Based on this data, we formulate preliminary typological implications and provide a list of relevant typological parameters.