Fiber reinforced composite material structure, composite material molded body using the same, and manufacturing method therefor

A fiber reinforced composite material structure comprising:

• a thin sheet that includes a first surface and a plurality of convex portions which protrude and are regularly arranged on the first surface and each of which includes a top face, the thin sheet including a reinforcing fiber;
• and
• a surface material that includes a second surface and is bonded to top faces of the convex portions on the second surface,
• wherein the reinforcing fiber in the thin sheet is a sheet-like material in which a plurality of long fibers are arranged in parallel in one direction where the sheet-like material is laminated so that each of the long fibers is aligned in 0° and 90° directions or a fabric formed of a long fiber,
• an arrangement of the plurality of convex portions includes a zigzag arrangement in which an arrangement direction of the plurality of convex portions forms an angle with respect to a longitudinal fiber direction of the reinforcing fiber,
• the plurality of convex portions include a first convex portion and a second convex portion adjacent to the first convex portion,
• a first area is defined by being surrounded by a boundary line between one convex portion among the plurality of convex portions, and the first surface,
• a pitch of the convex portions is 1.6 to 2.4 times the minimum diameter of the first area, and
• the pitch of the convex portions is defined by the gap between a center axis of the first convex portion which is perpendicular to the first surface and a center axis of the second convex portion which is perpendicular to the first surface.