The invention provides flaky titanic acid having polymerizable functional groups, a suspension of the same, titanic acid coating films excellent in tight adhesion, and resin bases with titanic acid coating films, namely, flaky titanic acid obtained by treating a layered titanate with an acid and then making an organic basic compound act on the obtained product to conduct interlaminar swelling or delamination, characterized in that at least part of the organic basic compound is one having a polymerizable functional group such as acryl or methacryl and, preferably, in that the layered titanate is one represented by the general formula: AxMy□zTi2-(y+z)O4 [wherein A and M are different from each other and are each a mono- to tri-valent metal; □ represents a Ti-defective site; x is a positive real number satisfying the relationship: 0