Tan Chuan-Jin PPA(P) (Chinese: 陈川仁; pinyin: Chén Chuānrén; Pe̍h-ōe-jī: Tân Chhoan-jîn; born 10 January[1][2] 1969) is a Singaporean former politician and brigadier-general.

In July 2023, both Tan and Cheng Li Hui resigned as members of the People's Action Party (PAP) after it emerged that they had been in a years-long extramarital relationship.

After the PAP team won with 56.65% of the vote against the National Solidarity Party, Tan became a Member of Parliament representing the Kembangan–Chai Chee ward of Marine Parade GRC.

[8] During his tenure at the Ministry of National Development, Tan worked with heritage, nature, environmental and animal welfare groups on issues related to the Rail Corridor and Bukit Brown Cemetery.

He also worked on issues which led to Sisters' Islands being designated as Singapore's first marine park, as well as amendments being made to the Animal and Birds Act.

[13] During the 2015 general election, Tan joined a five-member PAP team contesting in Marine Parade GRC again and they won with 64.07% of the vote against the Workers' Party.

[14][15] Tan retained his parliamentary seat in Kembangan–Chai Chee after his five-member PAP team contesting in Marine Parade GRC during the 2020 general election won again with 57.74% of the vote against the Workers' Party (WP).

On 11 July 2023, Tan made a public apology to WP MP Jamus Lim after a clip of him using unparliamentary language during a 17 April parliamentary sitting was shared on Reddit.

[18] Tan would be announced as an instructor for a "masterclass in leadership" held at the SMF Centre for Corporate Learning in a Facebook post, which would be quickly taken down due to significant backlash; the course itself would proceed as scheduled.