A boring machine for making a trench (T) in soil (S), the machine comprising a frame extending along a longitudinal direction (A), said frame having a bottom end , the boring machine having a boring device mounted at the bottom end of the frame , the boring device comprising: - a first boring member that is rotatable about a first axis of rotation (X1), the first axis of rotation (X1) being transverse to the longitudinal direction (A) of the frame ; - a first motor configured to drive rotation of the first boring member about the first axis of rotation (X1); - a second boring member rotatable about a second axis of rotation (X2), the second axis of rotation (X2) being stationary relative to the first axis of rotation (X1); - a second motor configured to drive the second boring member in rotation about the second axis of rotation (X2); - a third boring member rotatable about a third axis of rotation (X3), the third axis of rotation (X3) being spaced apart from and parallel to the first axis of rotation (X1); - a third motor configured to drive the third boring member in rotation about the third axis of rotation (X3); - a fourth boring member that is rotatable about a fourth axis of rotation (X4), the fourth axis of rotation being stationary relative to the first, second, and third axes of rotation (X1,X2,X3); and - a fourth motor configured to drive the fourth boring member in rotation about the fourth axis of rotation , the first, second, third, and fourth axes of rotation (X1,X2,X3,X4) lying substantially in a common plane (Q) that is transverse to the longitudinal direction of the frame ; and - a support that is mounted at the bottom end of the frame and that carries the first, second, third, and fourth boring members , together with the first, second, third, and fourth motors . - a first boring member that is rotatable about a first axis of rotation (X1), the first axis of rotation (X1) being transverse to the longitudinal direction (A) of the frame ; - a first motor configured to drive rotation of the first boring member about the first axis of rotation (X1); - a second boring member rotatable about a second axis of rotation (X2), the second axis of rotation (X2) being stationary relative to the first axis of rotation (X1); - a second motor configured to drive the second boring member in rotation about the second axis of rotation (X2); - a third boring member rotatable about a third axis of rotation (X3), the third axis of rotation (X3) being spaced apart from and parallel to the first axis of rotation (X1); - a third motor configured to drive the third boring member in rotation about the third axis of rotation (X3); - a fourth boring member that is rotatable about a fourth axis of rotation (X4), the fourth axis of rotation being stationary relative to the first, second, and third axes of rotation (X1,X2,X3); and - a fourth motor configured to drive the fourth boring member in rotation about the fourth axis of rotation , the first, second, third, and fourth axes of rotation (X1,X2,X3,X4) lying substantially in a common plane (Q) that is transverse to the longitudinal direction of the frame ; and - a support that is mounted at the bottom end of the frame and that carries the first, second, third, and fourth boring members , together with the first, second, third, and fourth motors . <EOS>