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The position of bright knots of 30 flares at their very beginning relative to the high-resolution isogauss maps of the longitudinal component (HII) and maps of the transverse component (H• of magnetic field are considered for seven days during the passage of the active and large spot group in Sept. 1963 (see Table I and maps on Figures 1-8).The flare bright knots occur simultaneously in regions of opposite magnetic polarity, and the majority of these knots are adjacent to neutral line Hif = 0, although not coinciding precisely with this line (Figure 9). Lenticular form of flare knots and the motions of bright material of flares is restrained by transversal field H• Also flares are closely associated (83 %) with so-called 'bifurcated regions', where specific crossing of transverse components takes place (Figures 4-5). There is wellexpressed (80 %) coincidence of flare knots with the strongest (positive or negative) electric currents as determined from the relation j = c/4zc rot H. The relation of results obtained to some existing theories of flares is briefly discussed.