This study suggests plants applicable to the interior of the bathrooms on express highways to save costs for indoor plant replacement and management of the bathrooms by examining and analyzing plant management status in total of 28 locations. First, indoor gardening space was examined, then status of use and management of indoor plants of each resting place was examined. Most bathrooms on express highways meet the fair condition of lighting, temperature and humidity to put plants. For example, 16 places(57%) out of 28 showed illumination intensity higher than 1000Lux. Average daytime temperature was 24.1℃; temperatures of most places were ranged in 21～25℃; humidity inside the bathrooms was about 60%, all of which indicate that most resting places have optimal environment to put plants in the bathrooms. To analyze management status of planting, survey was conducted on the managers. 2 locations out of total 13 subject locations are managed by 3 visits per month; 11 locations use direct management by each management office to manage the facilities. Plant replacement is done according to operation, management, and control system except 4 locations; and time for watering, removing of leaves and dust and replacement vary in each resting place. In addition, lighting and watering are considered the most important in most resting places and problems of plant management are frost damage during winter and watering.