Cloth Dripper The importance of the observation in the research on Physical Activity and Sport is manifested in all the lines of research of this knowledge area.Before the imnportance that in this method has the observers, we intend to offer a trainning methodology of the observers that European Dinner Forks assure the reliability in the data collection and, consistently, it will be a useful instrument for the investigation lines that certify this knowledge area.KEY WORDS: Observation, Observer training, Physical Education, Sport.