Nanoarchitectonics is the methodology for production of functional materials from nano‐units. In nanoarchitectonics, the conversion of molecules (chemistry, Chem), the control of nanostructures (nanotechnology, Nano), and the production of materials (materials science, Mat) are essential elements. In order to explain the contribution of Chem, Nano, and Mat to nanoarchitectonics, this review article is described according to two major sections, Chem & Nano and Nano to Mat. In Chem & Nano section, the integration of chemistry and nanotechnology is overviewed, and the next section, Nano to Mat, illustrates how molecules and nanomaterials are architecturally transformed into functional materials. These include supramolecular polymers and functional metal‐organic frameworks, which have attracted widespread attention, as well as emerging areas such as organic reactions by nanotechnology, chemical synthesis in nanospace, and material creation by dynamic motions at interfaces. It is emphasized that Chem+Nano+Mat is essential for nanoarchitectonics.