The effect of the wall greenery to reduce the heat flux and the accumulated volume of heat flow toward indoor from the wall for 24 hours in summer was analyzed for 3 different types of buildings where heat flux and other data were measured in the past. The reduction of the heat flux by the wall greenery at the time when the heat flux through the wall without vegetation was maximum were from 84. 51 to 13. 56 W (watt) / m² and from 96. 0 to 61. 6 % in ratio. The reduction of the accumulated volume of heat flow for 24 hours were from 1186. 79 to 265. 52 KJ/m2 and from 86. 4 to 59. 3 % in ratio.
