A MEMS gyroscope (1; 100; 200) comprising: a substrate; a first mass (7; 207) and a second mass (10; 210), the first mass and the second mass being suspended over the substrate and extending, at rest, in a plane of extension defining a first direction and a second direction transversal to the first direction; a drive structure (48; 145A; 245A) coupled to the first mass and configured, in use, to cause a movement of the first mass in the first direction; an elastic coupling structure (25; 25A) extending between the first mass and the second mass and configured to couple the movement of the first mass in the first direction with a movement of the second mass in the second direction; and a detection structure (46; 146A; 260A) coupled to the second mass (10; 210) and configured, in use, to detect a movement of the second mass in the first direction, in the presence of a rotation (Ω z) of the MEMS gyroscope about a fourth direction perpendicular to the first and the second directions (X, Y), wherein the elastic coupling structure comprises a peripheral compliant portion, a central compliant portion and a stiff portion, wherein the stiff portion has a stiffness greater than the stiffness of the peripheral compliant portion and the central compliant portion, wherein the peripheral compliant portion comprises a first arm extending, at rest, from the first mobile mass in a direction parallel to the first direction, and a second arm extending, at rest, from the second mobile mass in a direction parallel to the second direction, wherein the stiff portion comprises a first connection arm and a second connection arm each extending between a respective first end coupled to the peripheral compliant portion, and a respective second end coupled to the central compliant portion, wherein the first end of the first and the second connection arms (33, 34) is coupled to an end of the first and, respectively, the second arms (30, 31) of the peripheral compliant portion, wherein the first and the second connection arms (33, 34) extend, at rest, from the respective first end in a third direction in the plane of extension transversal to the first and the second directions (X, Y), wherein the central compliant portion comprises a first arm and a second arm coupled together at a joint end, wherein the first arm of the central compliant portion extends, at rest, in a direction parallel to the first direction, between the joint end and the second end of the first connection arm, wherein the second arm of the central compliant portion extends, at rest, in a direction parallel to the second direction, between the joint end and the second end of the second connection arm. a first mass (7; 207) and a second mass (10; 210), the first mass and the second mass being suspended over the substrate and extending, at rest, in a plane of extension defining a first direction and a second direction transversal to the first direction; a drive structure (48; 145A; 245A) coupled to the first mass and configured, in use, to cause a movement of the first mass in the first direction; an elastic coupling structure (25; 25A) extending between the first mass and the second mass and configured to couple the movement of the first mass in the first direction with a movement of the second mass in the second direction; and a detection structure (46; 146A; 260A) coupled to the second mass (10; 210) and configured, in use, to detect a movement of the second mass in the first direction, in the presence of a rotation (Ω z) of the MEMS gyroscope about a fourth direction perpendicular to the first and the second directions (X, Y), wherein the elastic coupling structure comprises a peripheral compliant portion, a central compliant portion and a stiff portion, wherein the stiff portion has a stiffness greater than the stiffness of the peripheral compliant portion and the central compliant portion, wherein the peripheral compliant portion comprises a first arm extending, at rest, from the first mobile mass in a direction parallel to the first direction, and a second arm extending, at rest, from the second mobile mass in a direction parallel to the second direction, wherein the stiff portion comprises a first connection arm and a second connection arm each extending between a respective first end coupled to the peripheral compliant portion, and a respective second end coupled to the central compliant portion, wherein the first end of the first and the second connection arms (33, 34) is coupled to an end of the first and, respectively, the second arms (30, 31) of the peripheral compliant portion, wherein the first and the second connection arms (33, 34) extend, at rest, from the respective first end in a third direction in the plane of extension transversal to the first and the second directions (X, Y), wherein the central compliant portion comprises a first arm and a second arm coupled together at a joint end, wherein the first arm of the central compliant portion extends, at rest, in a direction parallel to the first direction, between the joint end and the second end of the first connection arm, wherein the second arm of the central compliant portion extends, at rest, in a direction parallel to the second direction, between the joint end and the second end of the second connection arm.