The young officer was assaulted while making an arrest at Highpoint. Credit:Police Association

Prosecutors will appeal a teenager's "inadequate" sentence after the youth was not convicted or jailed after kicking a Victorian police officer in the head at a shopping centre in Melbourne's west.

The Acting Director of Public Prosecutions on Friday lodged an appeal against the sentence imposed on the 17-year-old boy, who was given a nine-month community corrections order without conviction in a children's court last month.

The teenager, who cannot be named for legal reasons, pleaded guilty to one charge of assaulting police and a charge of intentionally causing injury.

The 17-year-old kicked the police officer in the face at Highpoint Shopping Centre on Boxing Day last year while the 25-year-old senior constable was on his knees arresting another teen for alleged shoplifting.