A respiratory physiotherapy device, for exercising inhalation and exhalation in their natural physiological sequence, comprising a) a chamber extending along a substantially vertical axis X, and having a lower end and an upper end. said chamber being formed inside a hollow body; a1) said lower end of said chamber being in communication with a first air inflow opening for the inflow of exhaled air at said lower end of said chamber; a2) said lower end of said chamber being in communication with a second air inflow opening for the inflow of inhaled air at said lower end of said chamber; a3) said upper end of said chamber being in communication with a first air outflow opening for the outflow of exhaled air from the upper end of said chamber; a4) said upper end of said chamber being in communication with a second air outflow opening for the outflow of inhaled air from the upper end of said chamber; a5) said upper end of said chamber being in communication with said first and second air outflow (41, 42) via at least one opening formed in the upper part of said hollow body and via an annular chamber surrounding said chamber; a6) said chamber being designed to have air upwardly flowing therethrough during both inhalation and exhalation; b) a body within said chamber, which is vertically movable, said body being adapted to rise when said chamber has air flowing therethrough upwards in said chamber; c) a duct for exhalation and inhalation of air; d) an outlet hole, in communication with said first air outflow opening for the outflow of air from said chamber, to exhaust the exhaled air from said device; e) an inlet hole, in communication with said second air inflow opening, for the inhaled air to flow into said chamber; f) said first inflow opening for the inflow of air into the chamber being connected to said duct via a first non-return valve; g) said first outflow opening for the outflow of air from the chamber being connected to said outlet hole via a second non-return valve; h) said second inflow opening for the inflow of air into the chamber being connected to said inlet hole via a third non-return valve; i) said second outflow opening for the outflow of air from the chamber being connected to said duct via a fourth non-return valve. a) a chamber extending along a substantially vertical axis X, and having a lower end and an upper end. said chamber being formed inside a hollow body; a1) said lower end of said chamber being in communication with a first air inflow opening for the inflow of exhaled air at said lower end of said chamber; a2) said lower end of said chamber being in communication with a second air inflow opening for the inflow of inhaled air at said lower end of said chamber; a3) said upper end of said chamber being in communication with a first air outflow opening for the outflow of exhaled air from the upper end of said chamber; a4) said upper end of said chamber being in communication with a second air outflow opening for the outflow of inhaled air from the upper end of said chamber; a5) said upper end of said chamber being in communication with said first and second air outflow (41, 42) via at least one opening formed in the upper part of said hollow body and via an annular chamber surrounding said chamber; a6) said chamber being designed to have air upwardly flowing therethrough during both inhalation and exhalation; a1) said lower end of said chamber being in communication with a first air inflow opening for the inflow of exhaled air at said lower end of said chamber; a2) said lower end of said chamber being in communication with a second air inflow opening for the inflow of inhaled air at said lower end of said chamber; a3) said upper end of said chamber being in communication with a first air outflow opening for the outflow of exhaled air from the upper end of said chamber; a4) said upper end of said chamber being in communication with a second air outflow opening for the outflow of inhaled air from the upper end of said chamber; a5) said upper end of said chamber being in communication with said first and second air outflow (41, 42) via at least one opening formed in the upper part of said hollow body and via an annular chamber surrounding said chamber; a6) said chamber being designed to have air upwardly flowing therethrough during both inhalation and exhalation; b) a body within said chamber, which is vertically movable, said body being adapted to rise when said chamber has air flowing therethrough upwards in said chamber; c) a duct for exhalation and inhalation of air; d) an outlet hole, in communication with said first air outflow opening for the outflow of air from said chamber, to exhaust the exhaled air from said device; e) an inlet hole, in communication with said second air inflow opening, for the inhaled air to flow into said chamber; f) said first inflow opening for the inflow of air into the chamber being connected to said duct via a first non-return valve; g) said first outflow opening for the outflow of air from the chamber being connected to said outlet hole via a second non-return valve; h) said second inflow opening for the inflow of air into the chamber being connected to said inlet hole via a third non-return valve; i) said second outflow opening for the outflow of air from the chamber being connected to said duct via a fourth non-return valve.