A process for production of a substrate for attachment of cells at certain
positions and a substrate for attachment of cells. A support structure
comprising a hydrophobic resin base material and a hydrophilic polymer
layer formed on the hydrophobic resin base material. Areas of the
hydrophilic polymer layer and a chemical reaction product present on a
boundary surface between the hydrophilic polymer layer and the
hydrophobic resin base material are removed, so as to expose areas of the
hydrophobic resin base material at which cells will attach, by
irradiating the support structure with UV radiation emitted from a light
source via a pattern mask. The exposed areas are depressions with a
controlled shape matched to the mask pattern, each of the depressions
having a bottom surface which is formed by exposure of the hydrophobic
resin base material.