The number of children with no such problem rose to 72.8% in 2013, compared to 69.4% in 2011 and up from 52.9% in 2005.
The ISD Scotland statistics showed that, for the first time, primary seven children in all areas of deprivation had reached the target of 60% having no obvious decay in their teeth.
The figures also revealed that the average number of primary seven children's teeth affected by obvious decay has dropped from 1.29 in 2005 to 0.6 in 2013.
Public health minister Michael Matheson said: "I am delighted that the dental health of Scotland's children continues to improve.
"I would like to thank parents, school staff, health visitors and dental staff, who have all worked together to bring about this tremendous achievement.
"The largest improvement in oral health is in children living in our most deprived communities, showing that oral health inequalities are beginning to reduce."
A programme to promote toothbrushing and dental health rolled out nationwide in 2011, funded by the Government and involving health visitors, dentists and health support workers.
Every child receives free dental packs to support toothbrushing at home and some get a fluoride varnish put on their teeth.
Mr Matheson said: "It is great to see the work of the Childsmile Programme showing benefits."