A light-scanning apparatus according to the present invention is provided with: an optical fiber; a signal-generating portion that generates a driving signal that has a frequency fd different from a resonant frequency fr of the optical fiber; and a driving portion that causes a distal end of the optical fiber to undergo spiral oscillations in accordance with the driving signal, wherein the signal-generating portion generates the driving signal that includes, during one scanning period, a first period in which an amplitude gradually increases from substantially zero to a maximum value and a second period in which the amplitude gradually decreases from the maximum value to substantially zero, and that satisfies conditional expression (1) below. N2 is the number of oscillations of the driving signal in the second period. { Eq . ⁢ 1 } 2 ≥ 1 N ⁢ ⁢ 2 2 · 12 ( fd fr - 0.999 ) 2 ⁢ ( ⁢ when ⁢ ⁢ fd fr > 1 ) ( 1 )