A lighting apparatus having angle indicating means, comprising: a light source; a body accommodating the light source therein; and mounting means fixing the body to an object, wherein the mounting means comprises a mounting bracket, the mounting bracket having a connecting plate, and a fastening plate connected to each of opposite ends of the connecting plate in such a way as to be bent, with a rotary hole formed in the fastening plate, the lighting apparatus further comprising: angle indicating means provided between the fastening plate and the body, characterized in that the body comprises: a first mounting portion provided to mount the light source; second mounting portions provided on opposite sides of the body to mount shock absorbing assemblies mitigating vibrations or shocks transmission, with locking steps provided on front surfaces of the second mounting portions, and with seating recesses provided on rear surfaces of the locking steps and engaging with seating protrusions of a second fixing member; and a heat dissipating portion having a plurality of heat dissipation fins to enlarge a heat dissipation area of a rear surface, the mounting means further comprises an end plate disposed outside the fastening plate of the mounting bracket, the fastening plate of the mounting bracket comprises the rotary hole, and the end plate comprises an annular guide protrusion that is seated in the rotary hole of the fastening plate, the angle indicating means comprises: a mounting plate disposed between the fastening plate and the body, and having an annular groove; and an angle indicating plate coupled to the annular groove of the mounting plate, wherein the annular groove of the mounting plate is provided with notches symmetrically formed on two opposite sides of the annular groove, and the angle indicating plate is provided with projections fitted into the notches. a light source; a body accommodating the light source therein; and mounting means fixing the body to an object, wherein the mounting means comprises a mounting bracket, the mounting bracket having a connecting plate, and a fastening plate connected to each of opposite ends of the connecting plate in such a way as to be bent, with a rotary hole formed in the fastening plate, the lighting apparatus further comprising: angle indicating means provided between the fastening plate and the body, characterized in that the body comprises: a first mounting portion provided to mount the light source; second mounting portions provided on opposite sides of the body to mount shock absorbing assemblies mitigating vibrations or shocks transmission, with locking steps provided on front surfaces of the second mounting portions, and with seating recesses provided on rear surfaces of the locking steps and engaging with seating protrusions of a second fixing member; and a heat dissipating portion having a plurality of heat dissipation fins to enlarge a heat dissipation area of a rear surface, a first mounting portion provided to mount the light source; second mounting portions provided on opposite sides of the body to mount shock absorbing assemblies mitigating vibrations or shocks transmission, with locking steps provided on front surfaces of the second mounting portions, and with seating recesses provided on rear surfaces of the locking steps and engaging with seating protrusions of a second fixing member; and a heat dissipating portion having a plurality of heat dissipation fins to enlarge a heat dissipation area of a rear surface, the mounting means further comprises an end plate disposed outside the fastening plate of the mounting bracket, the fastening plate of the mounting bracket comprises the rotary hole, and the end plate comprises an annular guide protrusion that is seated in the rotary hole of the fastening plate, the angle indicating means comprises: a mounting plate disposed between the fastening plate and the body, and having an annular groove; and an angle indicating plate coupled to the annular groove of the mounting plate, a mounting plate disposed between the fastening plate and the body, and having an annular groove; and an angle indicating plate coupled to the annular groove of the mounting plate, wherein the annular groove of the mounting plate is provided with notches symmetrically formed on two opposite sides of the annular groove, and the angle indicating plate is provided with projections fitted into the notches.