This article intends to analyse, especially from a public law point of view, the new scenarios concerning mobility, with specific attention to sharing mobility (or shared mobility) and micro-mobility. In the perspective considered, the paper aims to deepen the notion of shared mobility, also highlighting its sustainability profiles. The study is carried out starting from Italian legislation (and, in particular, from the first provision that recognized sharing mobility at national level), then also considering the regional and provincial legislation of reference. The article also aims to analyze the relationship between the sharing mobility and the topic of Mobility as a Service (MaaS). Particular attention is also paid to micro-mobility, which is considered both at EU and national level. From the latter point of view, the article intends to outline the current regulatory framework at national level, also underlining any critical issues that characterize it.