Mascha Pijnenborg (born 30 June 1981) is a Dutch retired road racing cyclist.
Pijnenborg began racing at an amateur level in 2006. In 2008 she was a guest rider with Red Sun Cycling Team at the Tour Cycliste Féminin International de l'Ardèche. Following this she joined the team for 2 years.
She spent her 2 most successful seasons at , before joining for the final two years of her career.
Pijnenborg is also a counselor for people living with disabilities.