An interval correction unit for a power transmission tower performing interval correction is provided to prevent a power transmission cable from being damaged by clamping both ends of the power transmission cable with an elastic member. An interval correction unit for a power transmission tower performing interval correction includes a connecting insulator, a connecting fluid member(100), a moving fluid member, an elastic spring(160), power transmission fixing members(120,220), and a guide member(150). The connecting fluid members are coupled to a lower/upper part of the connecting insulator. The moving fluid member is inserted into an end of each of the connecting fluid member and is slidably moved. The elastic spring is installed inside the connecting fluid member and the moving fluid member. Both ends of the elastic spring support the connecting fluid member and the moving fluid member elastically. The power transmission fixing members are inserted into an end of the moving fluid member and are slidably moved. The guide member is installed inside the moving fluid member. The guide member moves the power transmission fixing member to a predetermined position.
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