Stitched carbon fiber base material and wet prepreg using same

A wet prepreg having shapability comprising:

• a stitched carbon fiber base material, wherein
• a plurality of sheet materials are layered and then stitched and united together into the stitched base material with a stitching yarn woven while passing through the sheet materials,
• each sheet material is formed by arraying carbon fiber lines, each having a predetermined width, in parallel with one another while an array direction of the carbon fiber lines of each sheet material forms an angle in a range from ±30° to ±60° to a weaving advancing direction of the stitching yarn,
• a stretch ratio of the stitched base material in its lengthwise direction in a case where a load per inch width of the stitched base material is applied in the weaving advancing direction of the stitching yarn is equal to or below 4% when the load is 5 N and is equal to or above 10% when the load is 25 N, and
• the wet prepreg is formed by impregnating the stitched carbon fiber base material, into which the plurality of sheet materials are layered and then stitched and united together with the stitching yarn woven while passing through the sheet materials, with a thermosetting resin in a range from 30% to 50% by weight.