The application of the principle of the best interest of children against
children who are gambling crimes in Tangerang. To know the application and
implementation of the principle obstacle in the best interest of the child gambling
crimes in Tangerang. The kind of research that used is normative legal research,
legal research is done through a process of abstraction deduction of positive legal
norms are applicable a description, systematization, analysis, interpretation, and
the rate of positive law, vertically and horizontally on the implementation of the
principle issues for the best interest for children against children crimes gambling
in Tangerang. Application of the principle of best interest of the child can already
implemented, but not optimally. In addition, there are obstacles in the application
of this principle, the law enforcement officers (police, prosecutors, and judge) do
not understand the importance of substance that contained in Undang-undang
Perlindungan Anak, that every action will taken is the best interest of the child and
to protection of children.