A lighting control apparatus for a vehicular lamp for controlling the flashing of a light source used as a vehicular lamp having a semiconductor light emitting device comprising: a control part for generating and outputting a control signal indicating luminous intensity of light emitted from the light source and a light source driving part for driving the light source based on the control signal provided from the control part, wherein the light source driving part is adapted to drive the light source to emit light such that the light repeats a predetermined luminous intensity change pattern at a predetermined cycle, wherein the predetermined luminous intensity change pattern comprises: (i) a first section where the luminous intensity is increased instantaneously from a lowest value to a highest value, (ii) a second section following the first section where the luminous intensity is maintained at the highest value, (iii) a third section following the second section where the luminous intensity is gradually decreased from the highest value to the lowest value, and (iv) a fourth section following the third section where the luminous intensity is maintained at the lowest value, wherein, in the first section, the luminous intensity changes from the lowest value to the highest value in the length of time equal to or less than 1/500 of the time length of the predetermined cycle, wherein the total length of time of the first section and the second section is set equal to or greater than 40 milliseconds. and wherein the length of time of the third section is set equal to or greater than 120 milliseconds. a control part for generating and outputting a control signal indicating luminous intensity of light emitted from the light source and a light source driving part for driving the light source based on the control signal provided from the control part, wherein the light source driving part is adapted to drive the light source to emit light such that the light repeats a predetermined luminous intensity change pattern at a predetermined cycle, wherein the predetermined luminous intensity change pattern comprises: (i) a first section where the luminous intensity is increased instantaneously from a lowest value to a highest value, (ii) a second section following the first section where the luminous intensity is maintained at the highest value, (iii) a third section following the second section where the luminous intensity is gradually decreased from the highest value to the lowest value, and (iv) a fourth section following the third section where the luminous intensity is maintained at the lowest value, (i) a first section where the luminous intensity is increased instantaneously from a lowest value to a highest value, (ii) a second section following the first section where the luminous intensity is maintained at the highest value, (iii) a third section following the second section where the luminous intensity is gradually decreased from the highest value to the lowest value, and (iv) a fourth section following the third section where the luminous intensity is maintained at the lowest value, wherein, in the first section, the luminous intensity changes from the lowest value to the highest value in the length of time equal to or less than 1/500 of the time length of the predetermined cycle, wherein the total length of time of the first section and the second section is set equal to or greater than 40 milliseconds. and wherein the length of time of the third section is set equal to or greater than 120 milliseconds.