The present permissible age of marriage for boys is 21 years while for girl its 18 year.
"I belief marriage age for both boy and girl be raised to 25 in accordance with the age old tradition of Ashrama system," Manjhi told reporters on the sidelines of "Janata ke Darbar me Mukhya Mantri" programme.
The Ashrama system divides life into four stages on the basis of age.
There was sound reasoning for categorisation of stages in the Shastras, he said and attributed the ills of health problem, population explosion and malnutrition due to violation of the age-old practise.
Also Read
"Why height of an average person has come down to 5 feet from earlier 7 feet?" he asked and attributed it to early marriage.
The 70-year-old CM cited his own example and said he got married after 25 and that's the reason even at this age he does not take any medicine.