The present invention provides a novel carbon-based material in whichcarbons different in property are combined in such a manner as to beapplicable toa device. The carbon-based thin film provides a carbon-based thin film 10including first phases 1 that contain amorphous carbon and extend in a filmthickness direction, and a second phase 2 that contains a graphite structureandintervenes between the first phases 1. In the thin film, at least one selectedfromthe group consisting of the following a) to e) is satisfied: a) the secondphasecontains more graphite structures per unit volume than the first phases; b) adensity of the second phase is larger than that of the first phases; c) anelectricresistivity of the second phase is lower than that of the first phases; d) anelasticmodulus of the second phase is higher than that of the first phases; and e) inthesecond phase, a basal plane of the graphite structure is oriented along thefilmthickness direction.
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