Podporuchik (Serbo-Croatian: potporučnik, потпоручник, Czech: poručík, Polish: podporucznik, Russian: подпору́чик, Bulgarian: подпоручик, п, Slovak: poručík) is an Officer's rank out of the Lieutenants rank group in Slavophone armed forces.
According to the modern day's NATO rank system Podporuchik might be comparable to the OF-1b ranks Second lieutenant / Pilot officer, Ensign, Leutnant / Leutnant zur See. With the exception of the more junior "podporuchik" OF-1c of the Czech Army until 2011, it should not be confused with Mladshy leytenant or Unterleutnant, OF-1c as well.
The rank was introduced first by Peter the Great in 1703 as officer rank of the so-called ober-officer rank group. It did belong to rank class XIII (infantry), class XII (artillery, and engineer troops), and class X (guards) until 1884. In line to the military reforms in 1884, podpraporshik became in peace time. However, in the guards and the cossacks armed forces Cornet and Chorąży remained the lowest officer rank.
The equivalent to podpraporshik was Michman in the Imperial Russian Navy, and governmental secretary (губернский секретар; gubernsky sekretar) in the civil administration.