Spin-coated films of a mesogenic phthalocyanine derivative, 1,4,8,11,15,18,22,25-octahexylphthalocyanine (C6PcH(2)), with macroscopic alignment of molecular stacking structure were obtained by processing in liquid-crystal phase of C6PcH(2). The column axis direction of the hexagonal columnar structure of C6PcH(2) was determined by microscopic observation and polarized optical absorption measurement and was uniform in the millimeter-scale area. Highly ordered molecular stacking structure in the film, which is similar to the single crystal, was clarified by measurement of molecular tilting angle with respect to the column axis. The origin of the macroscopic molecular alignment during film formation was investigated by taking the process-temperature-dependent properties of the films into consideration. (C) 2015 Elsevier B.V. All rights reserved.