A pozzetto armchair for use in multi-use rooms, conference rooms or classrooms, wherein the pozzetto armchair is defined as a type of armchair in which a seat is bounded by a back and by two sides that extend substantially as far as the ground, apart from feet or resting wheels; the upper part of the sides defining the zone of the arms, wherein the back and the sides of the pozzetto armchair can be distinct components but are being shaped and arranged so as to give rise to a single structure that spans the seat so as to make the seat more enveloping; wherein the back and the sides of the pozzetto armchair are each made as a single square or curved block that spans the seat, said pozzetto armchair comprising: - a seat; - a back; - two sides (4a, 4b) situated on sides opposite the seat and back assembly, said sides (4a, 4b) and said back extending substantially as far as the floor and being arranged so as to create a single structure that envelops said seat, i.e. spans the seat, each side (4a, 4b) having an upper portion defining an arm and a lower portion having rest means on said surface, said sides (4a, 4b) having a substantially planar extent and being parallel to one another; - at least one supply battery arranged in a protected chamber obtained inside the armchair, said chamber being obtained below said back; - a buffer panel that extends below the seat and extends in a direction moving away from said seat, said chamber being bounded by the sides (4a, 4b), by the buffer panel and by a cover element situated below the back. wherein the pozzetto armchair is defined as a type of armchair in which a seat is bounded by a back and by two sides that extend substantially as far as the ground, apart from feet or resting wheels; the upper part of the sides defining the zone of the arms, wherein the back and the sides of the pozzetto armchair can be distinct components but are being shaped and arranged so as to give rise to a single structure that spans the seat so as to make the seat more enveloping; wherein the back and the sides of the pozzetto armchair are each made as a single square or curved block that spans the seat, said pozzetto armchair comprising: - a seat; - a back; - two sides (4a, 4b) situated on sides opposite the seat and back assembly, said sides (4a, 4b) and said back extending substantially as far as the floor and being arranged so as to create a single structure that envelops said seat, i.e. spans the seat, each side (4a, 4b) having an upper portion defining an arm and a lower portion having rest means on said surface, said sides (4a, 4b) having a substantially planar extent and being parallel to one another; - at least one supply battery arranged in a protected chamber obtained inside the armchair, said chamber being obtained below said back; - a buffer panel that extends below the seat and extends in a direction moving away from said seat, said chamber being bounded by the sides (4a, 4b), by the buffer panel and by a cover element situated below the back. - a seat; - a back; - two sides (4a, 4b) situated on sides opposite the seat and back assembly, said sides (4a, 4b) and said back extending substantially as far as the floor and being arranged so as to create a single structure that envelops said seat, i.e. spans the seat, each side (4a, 4b) having an upper portion defining an arm and a lower portion having rest means on said surface, said sides (4a, 4b) having a substantially planar extent and being parallel to one another; - at least one supply battery arranged in a protected chamber obtained inside the armchair, said chamber being obtained below said back; - a buffer panel that extends below the seat and extends in a direction moving away from said seat, said chamber being bounded by the sides (4a, 4b), by the buffer panel and by a cover element situated below the back.