Abstract: Stackable stool, of those structured into an upper seat (1) and a lower support (2) joined together by a core/column (3), where the seat (1) has a groove (11) and the support (2) has a groove (21). These grooves (11), (21) are placed in opposite directions and are centred with respect to the core/column (3), and the widths (a1), (a2) of these grooves (11), (21) are able to house the core/column (3), so that, in order to snack stools it is sufficient to house the ends of the core/column (3) of one of them, respectively into the groove (11) of the next stool and in the groove (21) of the previous stool, with their cores/column (3) placed against each other.