Abstract: This research is to evaluate actual compliancy of web accessibility of national agencies and associations related to radiation organizations that are expected to have frequent access with the purpose of acquiring information about radiation safety. Furthermore, statistical significance of compliancy gap among national agencies and associations will be tested. K-WAH4.4 was used as an analyzing tool and 6 items (alternative text provision, provision of a title, basic language explicit, notice of new window opening, label provision, markup syntax) among 24 items of KWCAG 2.1, guideline for Korean web contents accessibility were chosen as evaluation items. Statistical analysis was conducted by mann-whitney test. First, national agencies showed relatively higher compliancy compared to associations. Second, both national agencies and associations showed high compliancy rate for ‘provision of a title’ and ‘notice of new window opening’ item. Third, average compliancy rate of ‘markup syntax’ item was 37.5%, significantly lower than other items. Fourth, while compliancy rate of national agencies was higher than that of associations, 3 items, ‘alternative text provide’, ‘basic language explicit’, ‘label provision’ were statistically significant in significance level of 5%. Web accessibility is an important issue for everyone. This research is further expected to improve web accessibility related to radiation safety for information havenots such as the disabled.