This study was aimed at investigating the effects of light quality of Light Emitting Diodes (LED) on plant growth and runner propagation of strawberry 'Toyonoka'. Strawberry plants were cultured under three different light qualities of LED, 6R2B1IR (red: blue: infrared = 6:2:1), 7RGB (red: blue: green = 7:1:1) and CW (full wave length, cool white), for 6 weeks to understand if the addition of infrared in red and blue light could promote strawberry propagation. The greatest leaf number, leaf area, biomass, photosynthesis, photosynthetic pigment content, photosynthate, runner and ramet production were shown in 6R2B1IR treatment (addition of 10% infrared). However, the leaf was thin. The results showed that supplemental infrared light could promote plant growth and runner production of strawberry 'Toyonoka', thus increase the benefit of seedling productivity.