In densely wooden build-up areas, ventilation conditions and summer thermal environments seem not to be so good because of narrow streets and high-density wooden houses. Therefore, authors measured the outdoor temperature distribution in low-rise and high-density urban area. Also wind measurement was performed. By using CFD, wind distribution was also simulated. And the relationship between temperature distribution and wind distribution was analyzed. Major findings are as follows. 1) Negative correlation coefficient between temperature and wind is found. 2) More wind flow in normal road than alley. And normal road is cooler than alley. 3) More wind flow in the alley which is close to high building than normal alley. And the alley which is close to high building is cooler than normal alley.%木造密集市街地では，狭幅員街路や木造住宅が密集することによる風通しの悪化，それに伴うエアコン室外機等の排熱の滞留，昼間の木造住宅（熱容量が小）の表面温度上昇，そしてそれらに伴う気温上昇等の熱環境悪化が懸念される。また，現在，我が国の多くの木造密集市街地では，人口減少による空き地や空き家の增加が見られ，さらには防災上の課題（延焼危険性や建物倒壊危険性が髙い）を抱えている。
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