This paper investigates stress recovery effect of greenery volume in an office space. Indoor greenery is expected to mitigate stress of occupants in an office space mainly due to the visual effect. Subject experiments are carried out to investigate the maximum effect of indoor greenery by changing greenery volume in a simulated office space. Two types of desk layouts are prepared for the experiments. Greenery volume and layout are modified in 6 types, including the control condition without a plant. Pulse rate and flicker value are measured and inquiry by the semantic differential is carried out for the subjects. As a result, the maximum stress recovery effect is observed when the greenery volume is in the middle ratio for the dynamic visual field.
