To prevent local heating of a stationary induction electric apparatus and, at the same time, to reduce size of the apparatus and prolong service life of the apparatus, by communicating a plurality of branch pipes with each other in the middle of a pipeline, and providing discharge ports of the branch pipes on the internal surfaces of an upper clamp and a tank to which magnetic fluxes are condensed.

A cooling pipeline 10 below a transformer is divided into branch pipes 11 and l3, and the pipes 11 and 12 are introduced into the upper section of a tank 1. The branch pipe 11 is communicated with a coolant jetting port 16 attached to an upper clamp. Similarly, the branch pipe 12 is communicated with another coolant jetting port 17 attached to the tank 1. Here, the ports 16 and 17 are partially or entirely formed of an insulating material. At a local heating section where the maximum temperature rise is expected, in addition, the flow rate of a coolant 2 is increased by making the diameter of the branch pipe 12 larger than that of the branch pipe 11.