It opened in 1972, its purpose being to collect finds handed in by private individuals and unearthed during excavations in the Kilkis area.
The exhibits are arranged in the rooms in chronological order, they date from the Neolithic to the Roman period, and they come from excavations in the settlement of Kolchida, the cemetery at Palaio Gynaikokastro, the archaeological site at Filyria, and other parts of the Kilkis Prefecture.
In the entrance hall are the prehistoric finds from the excavations at Tsaousitsa and Axiochori, and occasional finds (stone statuettes and amulets) from Pedino, Gallikos, and Axioupoli.
In the second hall are sculptures, inscriptions, and grave stelai of the Classical, Hellenistic, and Roman periods.
The most important exhibits are the Kouros from Evropos, which represents a young man and dates to the 6th century BC, and the four statues from the heroon at Palatiano (2nd century AD).