This article demonstrates that under some circumstances there is asymmetry between conjunctive targets in visual search with no detectable asymmetries between the individuai features that compose these targets. Experiment 1 demonstrates this phenomenon for targets composed of color and shape. The reaction time to some targets was more affected by the number of distractors present in the display than the reaction time to other targets. Experiment 2 demonstrates the same asymmetry in search rate for targets composed of size and orientation. A model is proposed to account for this asymmetry. One prediction of this model is that search rate of individual features cannot predict the search rate for conjunctive targets. This prediction was tested and confirmed in Experiment 3. The proposed model and other models of visual search are discussed. It is pointed out that some of these models cannot account for the findinqs of this study.