The paper summarises the importance of body language as the basis of communication between humans and horses. Understanding horse body language is crucial for successful communication. Horses in communication use their entire body from head to tail and will respond to even the smallest signs made by their human companions. Accordingly, humans should be aware of their body language and pay close attention to body language communication when working with horses. In this sense, there is also a need to increase research on equine welfare during human-horse interactions, assessing not only the negative but also their positive affective states.