As interest in microplastic (MP) increases, one of the most used methods for MP analysis is Raman spectroscopy, which is non-destructive and providing unique molecular fingerprint spectrum. However, due to the similarity of Raman scattering process with respect to fluorescence, fluorescence interference has been a major obstacle in Raman analysis. Researchers make efforts to use long-wavelength lasers, such as 785 nm and 1064 nm to avoid it. Here, we discuss the possibility of detecting MP using commonly used visible laser (532 nm, 633 nm), by examining photobleaching phenomenon in the microplastics which are fragmented from colored bulk PS samples. We conducted Raman measurements by varying the size of the plastic, dye concentration, and laser power to observe photobleaching depending on the amount of the fluorophore and the density of incident photons. It occurred more rapidly with smaller size, lower dye concentration, and higher laser power. For commercial samples, PS particles smaller than 5 μm can be photobleached within 27 seconds, allowing us to obtain Raman spectrum of PS. Particularly for particles smaller than 2 μm, photobleaching occurred rapidly enough to ignore fluorescence interference. Additionally, consistent results were observed in wastewater samples collected from a plastic recycling plant. Microplastic particles, including polyethylene (PE), polypropylene (PP), and polymethyl methacrylate (PMMA), with sizes less than 5 μm, were successfully identified using a 532 nm laser. Our results suggest that it is possible to obtain sufficient signals for microplastics using visible lasers without the necessity of using long-wavelength lasers.