The article deals with the consideration of such topic as internal and external in law and their correlation. This topic is understudied in juridical science. Despite the application of terms «internal» and «external» in the investigation of the essence, content, form, structure of law, in fact, their function is reduced to the values of epithets in the characteristics of its certain qualities (parties). However, it is not clarified what is internal and external in law. Due to this and taking into account the generally scientific status of these categories, it is necessary to define their methodological role in the solution of certain problems of law theory Herewith, it is also important to avoid dogmatism and scholasticism in the interpretation of internal and external concerning law. If the first one is something hidden in a phenomenon, which cannot be watched obviously, the external is oppositely possible to be watched, as well as completely real. The connection between the categories of «internal» and «external» and other categories of dialectics, as well as their demonstration in law were highlighted. Particularly, the nature of the essence of law as simultaneously internal and external, but as something internal in it, was analyzed. From these positions, there is comprehensive consideration of the notion of internal and external concerning the form and the structure of law, which in respect of methodology is the most complicated in theory. Therefore, in this aspect it requires certain correction and clarification. The author considers that in the context of internal and external in law, the division of its structure into internal and external is artificial, instead of proceeding from the unified comprehension of its form and its non-identification with its other notions, particularly with structure. The results of the matter of internal and external in law testify that indeed there is no the internal form of law. However, there is structure composed of norms, institutions, spheres and system. The last ones are internal in law. Legislation is external. It is also characterized by its own internal and external. Therefore, as Georg Hegel asserted, something internal is also something partially external; and something external is also something partially internal.
Keywords: law, internal, external, form of law, internal form, structure, external form of law, legislation