To uniformly distribute load on the occasion of manufacturing a laminated magnetic core substrate block by obliquely pressbonding a plurality of rectangular magnetic core substrates using a tool for oblique press-bonding.

On the occasion of manufacturing a laminated magnetic core substrate block 4 from a plurality of rectangular magnetic core substrate using a tool for obliqud press- bonding, when a loading point is selected to one point, the loading point is set to the point Qa where the vertical line L of the intermediate point P of the load terminating surface 4a of the laminated magnetic core substrate block is crossing the load starting surface 4b. Meanwhile, when the loading points are set to n points, the first loading point is set to the point Q1 where the vertical line from the lower end S1 of the load terminating surface 4a of the laminated magnetic core substrate block 4, the (n-1) loading points are obtained by repeating for (n-1) times (n is 2 or larger integer) the operations for obtaining the first load point considering the point S2 where the horizontal line passing the first load point Q1 crosses the load terminating surface as the lower end of the loading terminating surface and the point Qn where the vertical line of the intermediate point P of the load terminating surface cross the load starting surface 4b is defined as the n-th load point considering the point Sn where the horizontal line passing the (nG-1)the load point Q(Γn-1) crosses the load terminating surface as the lower end of the load terminating surface.