To provide an avalanche preventive structure coping with the change in snow quality in a snowy period and effective throughout a whole period.

An avalanche can be effectively prevented throughout the whole snowy period by anchoring and fixing slip preventive bodies 1 each having a height of at least 10% of snow coverage depth and a length of at least 100 cm, to a slope. Even for soft snow quality in the snowfall period, the length of the slip preventive bodies 1 is sufficient and a pressure receiving width is large to cause no void. An avalanche preventive effect is sufficient even to a hard quality of compacted snow in a snow melting period, and the avalanche can be prevented coping with all the periods of the snowfall period and snow melting period.

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