After ionization in the solar wind, He+ pickup ions of the interstellar origin are expected to be accelerated at heliospheric shocks (the termination shock, CIR (co-rotating interaction region) shocks, and planetary bow shocks), and to become the seed population for anomalous cosmic rays. Although there are many theoretical attempts to treat the 'injection' process of the helium pickup ions at these shocks, there has been little direct observational evidence. In this report we present in situ identification of the initial acceleration process of pickup He+ at the bow shock.