The 21-share benchmark, the CROBEX, added 0.22% to close at 2,831.86 points, its sixth gain an a row.
The narrower equity index CROBEX10, which tracks the top ten issuers in terms of free float, market capitalisation and liquidity, went up 0.20% to 1,706.72 points.
Hrvatski Telekom was the most traded company with a turnover of 297,200 euro ($323,000), as its shares rose 1.97% to 31.10 euro.
Shares of ICT solutions provider Ericsson Nikola Tesla [ZSE:ERNT] fell 0.48% to 207 euro in a turnover of 101,000 euro.
The total bourse turnover amounted to 1.5 million euro, unchanged compared to Friday.
($ = 0.921 euro)