To provide a native wood board having an artificial grain pattern which is close to a natural aesthetic property, and its manufacturing method.

The manufacturing method of the native wood board comprises the steps of allowing a punch 73 with a taper given on the side surface to bite into a board main surface 80m of the native wood board 80 by an application of pressure so as to form a concave portion 81 with the predetermined depth, the sectional area of the taper reducing toward a tip side of the punch, and of cutting a surface part of the native wood board 80 with the concave portion 81 formed until an artificial grain pattern-formed area 83 formed at a position distanced by the predetermined depth from the bottom of the concave portion 81 is exposed.