The HERA-B experiment is designed to study CP violation phenomena in the CP
system. The physical program of the HERA-B detector includes the measureme
nts of CP asymmetries in B-d --> J/psi K-s(0) and B-d --> pi(+)pi(-) decay
channels, search for direct CP violation phenomena and many other items. An
overview of detector and trigger technologies, the current status of the d
etector and the experience gained during the test runs is reported.