The characteristics of wind forces on an external sunblind and the characteristics of the vibrations are investigated through full-scale measurements in natural wind. The sunblinds are installed on the outside walls of a building. The results obtained from this study are as follows: 1. The maximum peak force coefficient is about 1.0, and acts upward on the sunblind set on the windward wall. On the sunblind on the sidewall, the maximum peak force coefficient was the same but acts downward. 2. The maximum displacement of the blind can be obtained by quasistatic assumption which used the peak wind force except for the case of the slat angle 0 degree of the windward wall. In the case of the slat angle 0 degree of the windward wall, it is necessary to take the effects of a response into account.
