The oppposition Tautua Samoa party has called for the ruling HRPP to overcome the rifts within its ranks.
The dissent stems from a group within the HRPP which has demanded the sacking or resignation of the finance minister, Faumuina Tiatia Liuga.
The opposition leader, Palusalue Faapo II, has told reporters the division is neither good for the government nor the country as it prepares to host the Small Island Developing States Conference in September.
He says the prime minister, Tuila'epa Sa'ilele Malielegaoi, left last week to attend the launch of the year of the SIDS at the UN headquarters in New York.
The opposition leader says they want a stable government and not party politics.
The prime minister is due to return at the weekend.