It is not a simple semantic coincidence that in France, to indicate the role of entrepreneur, the term “Patron” is used. A word that phonetically evokes the notion of “Pater Familias”, that not only shares its etymology but also the strong historic-moral meaning, since French businesses, especially small ones, find that more than economic cells, they are cultural universes where private and professional lives are tightly connected. Therefore it is not surprising that recently conducted empiric research revealed the net majority in France of small and medium sized family-run businesses, where “family run” includes those businesses where one of the three following conditions is true: the business was inherited, the share capital is divided between members of the same family, work is performed with a relative. In this context the prominent trait of strong concentration, found in both management and ownership, makes the following characteristics widely diffused in French businesses: small, authoritative and paternalistic management, aversion to proxies, personnel selection criteria scarcely meritocratic, managers fees lonely and overburdened. This makes the close interdependence that is created between the entrepreneur and his business very dangerous to the point where the life cycle of the first matches the essential phases of the second. To avoid the lethal dangers inherent to this union, some behavioural models are suggested for the small business Patron, in order to preserve that durable character that every company should institutionally safeguard.