Phosphor-containing film and backlight unit

A phosphor-containing film comprising:

• a phosphor-containing layer having a resin layer which has impermeability to oxygen and is provided with a plurality of discretely arranged concave portions, and a plurality of fluorescent regions, each of which is arranged in the concave portion formed in the resin layer and contains a phosphor that deteriorates through a reaction with oxygen in the case of being exposed to oxygen;
• and
• a first substrate film laminated on one main surface of the phosphor-containing layer and a second substrate film laminated on the other main surface of the phosphor-containing layer,
• wherein the fluorescent regions contain the phosphor and a binder,
• the resin layer has a modulus of elasticity of 0.5 GPa or more and 10 GPa or less,
• a depth h of the concave portion of the resin layer is 1 μm or more and 100 μm or less,
• a width t between adjacent fluorescent regions is 5 μm or more and 300 μm or less, and
• an aspect ratio h/t of the depth h to the width t between adjacent fluorescent regions is less than 3.0.