This paper reports the effect of the Ise-Bay Typhoon of September 26th, 1959, on th wooden dwelling houses of a new residental quarter at Idakanishiyama, Nagoya-shi. This quarter divided into 94 lots contained, at that time, 5 vacancies, 79 wooden houses and 10 houses built by other construction than timber, the greater part of houses being under construction just before completion. This quarter is located at the foot of downward slope facing south-east and is surrounded by no shelter. Therefore, all houses were, under almost same condition, exposed direct to the heavy wind shifting from east to south. By this reason, a great deal of damage was done to wooden houses. A summary of conclusion based on our investigation follows: (1) When typhoon, the damage of opening such as window, glass door, etc. gives a structural deathblow to houses. Therefore, it ts necessary, when typhoon, to give emergency works such as covering of opeings, structural reinforcement, etc. to houses being in course of construction. On the other hand, it is necessary, in established houses, to watch the openings during typhoon, and to give them immediate repair in case of damage. (2) Generally speaking, the conditions of light roof, low-pitched roof and deep eave, which are found in metal roofing, are very unfavourable against wind. In long size sheet iron roofing, carefullness is especially required, because the damage of this roofing tends to be wide-spread and heavy in case of damage. On the other hand, Japanese clay tile roofing (Kawara roofing) is favourable against wind, because the area of damage is very small and, furthermore, repair is easy. Experience of investigation, however, suggest that metal roofing is more advantage than Japanese clay tile roofing against wind, as far as construction of truss roof and roofing work at the ends of eave and verge are complete and safe, (3) High building is not all/always disadvantage against wind. In other words, there is no relation between the height of building and the degree of damage. (4) Lately built wooden houses constructed on the basis of Buildieg Standard Law Enforcement Order are fixed on the continues footing and satisfy nocessary structural strength, so their frames are almost safe, from the point of structural strength, against wind, as far as considerable structural defect do not exist. According to the result of investigation, however, method of connection between diagonal bracing and column or horizontal member, or method of joint between column and horizontal member is not all approval and these brought indirectly two houses to collapse. Therefore, this problem seems to demand us reconsideration. There is need for giving wide-spread knowledge of timber structure to designers and field engineers who are actually building and maintaining wooden houses and for reeducating them. (5) Japanese earth-plaster wall construction tends to be fallen off, when beaten by wind and rain under construction, conequently resistance of building against horizontal force is reduced.