Pesticide spray drift has a significant impact on environment contamination and human health problems which are caused by pesticide application. Several factors may influence spray drift such as physical parameters, meteorological parameters and technological parameters. Various studies were carried out in a wind tunnel in order to study the influence of such parameters on spray drift (Nuyttens et al., 2007; Nuyttens et al. 2009). All these studies were mainly focused on the definition of quantitive deposition on collectors at different distances or heights according to ISO 22856. In addition, only one nozzle positioned frontally (wind direction perpendicular to the main axis of a flat fan spray) is generally tested. The objective of the present work is therefore to evaluate the effect of boom position (lateral and frontal position), different nozzles types, and different wind speeds on spray drift as measured in a wind tunnel.