An angle-adjustable and swingable Smith machine comprising: a frame portion which forms an exercise space; a swing portion disposed in the exercise space and connected to the frame portion, the swing portion including first and second vertical bars (21a, 21b) arranged at an interval, a horizontal bar configured to connect top ends of the first and second vertical bars (21a, 21b), and a holding member installed on one side of each of the first and second vertical bars (21a, 21b) and including a plurality of concave portions formed thereon; a guide portion integrally connected to the swing portion to swing therewith; a rail portion installed at a top end of the frame portion and configured to guide a movement of the swing portion and comprising a plurality of fixing grooves formed on at least one side of the rail portion to set or to fix an angle of the swing portion; an angle adjusting portion for adjusting the angle of the swing portion in connection with the rail portion; and a barbell portion coupled to the guide portion to move upward or downward, characterized in that the swing portion further includes a supporting roller portion installed in a top end of the horizontal bar to engage with a top end of the rail portion and configured to move along the top end of the rail portion, the rail portion is configured to connect a front and a rear of the top end of the frame portion, and the angle adjusting portion includes a main adjustor installed on one side of the first vertical bar to operate when a user adjusts the angle of the swing portion, a pivoting bar in which a bottom thereof is hinge-coupled to the first vertical bar and a top thereof pivots according to a movement of the main adjustor, an operating rod connected to a top end of the pivoting bar and installed on the horizontal bar while extending toward the rail portion, and an angle adjustor installed on an end of the operating rod and configured to be inserted into one of the fixing grooves according to a translation movement of the operating rod. a frame portion which forms an exercise space; a swing portion disposed in the exercise space and connected to the frame portion, the swing portion including first and second vertical bars (21a, 21b) arranged at an interval, a horizontal bar configured to connect top ends of the first and second vertical bars (21a, 21b), and a holding member installed on one side of each of the first and second vertical bars (21a, 21b) and including a plurality of concave portions formed thereon; a guide portion integrally connected to the swing portion to swing therewith; a rail portion installed at a top end of the frame portion and configured to guide a movement of the swing portion and comprising a plurality of fixing grooves formed on at least one side of the rail portion to set or to fix an angle of the swing portion; an angle adjusting portion for adjusting the angle of the swing portion in connection with the rail portion; and a barbell portion coupled to the guide portion to move upward or downward, characterized in that the swing portion further includes a supporting roller portion installed in a top end of the horizontal bar to engage with a top end of the rail portion and configured to move along the top end of the rail portion, the rail portion is configured to connect a front and a rear of the top end of the frame portion, and the angle adjusting portion includes a main adjustor installed on one side of the first vertical bar to operate when a user adjusts the angle of the swing portion, a pivoting bar in which a bottom thereof is hinge-coupled to the first vertical bar and a top thereof pivots according to a movement of the main adjustor, an operating rod connected to a top end of the pivoting bar and installed on the horizontal bar while extending toward the rail portion, and an angle adjustor installed on an end of the operating rod and configured to be inserted into one of the fixing grooves according to a translation movement of the operating rod.