Abstract: The effect of visual cues of sound source distance on loudness is investigated when the sound source distance changes in near field. A real spherical sound source is positioned in front of listener in an anechoic chamber, and eight listeners perform loudness matching for the stimuli at a reference distance of 1.0 m and seven test distances of 0.3~0.9 m under two conditions of eyes opening and closing at three center frequencies of 500 Hz, 1 kHz and 2 kHz. The results show that as the sound source distance decreases, loudness in eyes opening increases less than that in eyes closing. The results of loudness matching in eyes closing are in accordance with the changes of sound pressure levels measured at the blocked ear canal entrance. It demonstrates that listeners judges the loudness based on the sound pressure levels at their ears when their eyes close. However, when eyes open, the visual cues of sound source distance affects loudness perception. The results also show that the effect of visual distance perception on loudness is more obvious at lower frequencies.