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We investigate the B meson light-cone distribution amplitudes in the heavyquark limit which are relevant for the QCD factorization approach for the exclusive B meson decays. We derive exact relations between twoand three-particle distribution amplitudes from the QCD equations of motion and heavy-quark symmetry constraint. As solution of these relations, we give representations for the quark-antiquark distribution amplitudes in terms of independent dynamical degrees of freedom. In particular, we find that the Wandzura-Wilczek-type contributions are determined uniquely in analytic form in terms ofΛ, a fundamental mass parameter of heavy-quark effective theory, and that both leading-and higher-twist distribution amplitudes receive the contributions of multi-particle states with additional gluons.DESY 01-135 HUPD-0108

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