Аннотация:The article deals with the general considerations on the relationship between Public and Private Law and on the relationship of the Professional Soldiers Act (Act no. 221/1999 Coll., on Professional Soldiers) to other legal regulations. The contribution also defines and interprets certain terms (family, household/shared household, close person, child, spouse/partner) at which demonstrates the combination of both legislative branches. It attempts to demonstrate that the laws so called armed legislation, particularly the Professional Soldiers Act is not a world closed on itself, but rather an area that is a part of the unified legal system linked to a number of laws, including Private Law (especially to the CivilCode and Labour Code).