A search for scalar and vector leptoquarks coupling to first
generation fermions is performed by the H1 experiment using
the full HERA~II $e^{\pm}p$ data, collected in the years 2003-2007. No
significant evidence for the direct production of such particles is
found in a data sample with a large transverse momentum final state
electron or with large missing transverse momentum. The results of the
present analysis are combined with those of the searches in the $e^{+}p$
and $e^{-}p$ data of the HERA I phase in order to obtain the respective
mass spectra using the complete HERA~I+II data.