We investigate angular distributions of the transmitted 60 keV and 120 ke mV O3+ ions through nanocapillaries with 5Onm diameter and 10 μm length. The experimental results are in agreement with the guiding effect found by Stolterfoht et al. For different tilted angles of the nanocapillary membrane with respect to the beam, the angular distributions of the transmitted ions are measured by a one-dimensional micro-channel plate (MCP) detector. Moreover, the dependence of this guiding effect on the projectile energy is studied.