The Jakarta Stocks Exchange composite index rose 1.522 points at 1,063.697 on volume of 3.32 billion shares worth 5.02 trillion rupiah (507.07 million dollars.)
Decliners led advancers 44 to 37, while 71 stocks were flat.
The rupiah was at 10,030-10,040 to the dollar compared to Wednesday's 9,990-10,000.
"In general the market is directionless. I guess people are taking a wait-and-see stance ahead of the Idul Fitri holidays and amid lingering uncertainty over a possible cabinet reshuffle," said Felix Sindunata, analyst with Pacific Duaribu.
He said the index found support from some companies that have just reported strong nine months results such as Gudang Garam and Indocement.
Gudang Garam was up 150 at 9,950 rupiah.
Cement firm Indocement rose 125 rupiah at 3,250 while rival Semen Gresik also gained 200 at 18,500.
Carmaker Astra International was up 250 at 9,350 rupiah.
Satellite operator Indosat dropped 50 at 5,050 rupiah while telecom firm Telkom was flat at 5,050.