PROBLEM TO BE SOLVED: To provide a package for a measurement sensor that can conduct highly accurate measurement while suppressing an influence from crosstalk, and to provide a measurement sensor.SOLUTION: The package 1 for a measurement sensor includes a substrate 2. The substrate 2 includes a first accommodation recess 20a including a first bottom face 20d to which a light-emitting element is implemented and a second accommodation recess 20b including a second bottom face 20e to which a light receiving element is implemented, where a depth d1 of the first accommodation recess 20a is shallower than a depth d2 of the second accommodation recess 20b.SELECTED DRAWING: Figure 3COPYRIGHT: (C)2017,JPO&INPIT【課題】 クロストークの影響を抑制して高精度の計測が可能な計測センサ用パッケージおよび計測センサを提供する。【解決手段】 計測センサ用パッケージ1は、基体2を含む。基体2は、発光素子を実装する第1底面20dを含む第1収容凹部20a、および受光素子を実装する第2底面20eを含む第2収容凹部20bを有し、第1収容凹部20aの深さd1を、第2収容凹部20bの深さd2よりも浅くする。【選択図】 図3