In manufacturing a ceramic multi-layer wiring substrate which is formed by stacking a plurality of ceramic layers and which includes an internal wiring, a ceramic paste is printed using a screen printing process on a part of a ceramic green sheet to be a ceramic layer having the internal wiring formed thereon which part does not include the internal wiring, to form between the ceramic layers a ceramic filling layer including a same ceramic component as that in the ceramic layers which ceramic filling layer is not formed on the internal wiring. The ceramic paste includes a ceramic component, an acrylic resin, and a cellulose resin, and loss factor tan .delta. of the paste represented by (loss modulus)/(storage modulus) in a dry condition after printing is equal to or greater than loss factor tan .delta. of a conductor paste layer to be the internal wiring in a dry condition.

 
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