Аннотация:Results of photometric observations (1981 - 1985) are given for the transient X-ray source A 0535+26, whose optical component is the Be star HDE 245770. Analyzing the photometric data the authors deteced radiation of a disc of accreting matter that is gradually accumulated, precipitating afterwards on to the neutron star's surface. The latter leads to a X-ray flare. Physical parameters of the accreting accumulating disc are determined. The characteristic timescale of formation of such a disc is likely to be ≡1000 days.