The pure military crime is a criminal action of conducted by a military, by reason of the
particular traits of military. One of the pure military crime of which often conducted in the
environment of Indonesian Military Army is the crime which is a way for a military to draw
himself from the implementation of formal duties is the desertion crimes. Meanwhile the
desertion crime is regulated in the Article 87 of the Law Number 39 of 1947 (KUHPM). The
purpose this legal research was 1)To find out what are the factors which cause members of the
Indonesian National Army committing a crime of desertion, and 2) to find out how efforts to
control the crime of desertion committed by members of the Indonesian National Army. The type
of research conducted in the compilation of this thesis was normative, i.e. a research focused on
the norms and this research needed secondary data (legal source) as main data and collected
any data from the parties who comprehend about the studied case by conducting interview with
the source persons. The conclusion of this legal writing/thesis is: Firstly, there are two factors
causing the members of Indonesian Military Army to conduct desertion crime, i.e. internal and
external factors; Second conclusion of this legal writing/thesis is the crime prevention efforts
desertion committed by military members are divided into two ways; first is preventively and
second is repressively.