The invention relates to a plastic lens and a manufacturing method for the plastic lens, the plastic lens comprises a plastic lens base material; a hard coat layer formed on the plastic lens base material; an organic antireflection film formed on the hard coat layer; and a primer layer between the plastic lens base material and the hard coat layer. The plastic lens base material contains at least a sulfur atom. The hard coat layer contains at least: metal oxide particles containing a titanium oxide having a rutile-type crystalline structure; and an organosilicon compound represented by a general formula of R<1>SiX<1>3. The antireflection film comprises a coating composite which at least comprises: the organosilicon compound represented by a general formula of XmR<2>3-mSi-Y-SiR<2>3-mXm; the organic compound comprising epoxy whose molecule comprises at least one expoxy; and silicon dioxide particles including average grain size of 1nm to 150nm, the refractive index of the antireflection film is lower by at least 0.10 than that of the hard coat layer.