ENThe article discusses the military expenses of the Lithuanian Field Hetman Michał Kazimierz Radziwiłł in the years 1668-1673 and 1676. It is a good source to reconstruct the structure of the budget of Lituanian hetmans in the second half of the XVII century. The second part is the editions of sources - two military accounts of Michał Kazimierz Radziwiłł, from the National Library of Russia in Sankt Petersburg.