| Official Name: | Sandimen Township 三地門鄉 |
| Subdivision Type: | Location |
| Subdivision Name: | Pingtung County, Taiwan Province, Republic of China |
| Area Total Km2: | 196 |
| Population As Of: | February 2024 |
| Population Total: | 7717 |
| Population Density Km2: | auto |
| Sandimen Township | |
| T: | 三地門鄉 |
| P: | Sāndìmén Xiāng |
| W: | San1-ti4-men2 Hsiang1 |
| Poj: | Sam-tē-mn̂g-hiong |
| Phfs: | Sâm-thi-mùn-hiông |
| T2: | 山地門 |
| P2: | Shāndìmén |
| Poj2: | Soaⁿ-tē-mn̂g |
Sandimen Township[1] is a mountain indigenous township in Pingtung County, Taiwan Province, Republic of China. The population of the township consists mainly of the Paiwan people with a substantial Rukai minority.
Ethnic Chinese settlers homophonically translated the original Paiwan name (setjimur|lit=people of Tjimur communinty[2]) into Hokkien (; or). Under Japanese rule the name was . Following the handover of Taiwan from Japan to the Republic of China in 1945, the area became Sandimeng Township but the name was changed again in 1947 to Sandi Township but the Taiwanese pronunciation of Soaⁿ-tē-mn̂g continued to be commonly used.[3] In August 1992, the township assumed its current name.
During the Japanese era, Sandimen was grouped with modern-day Majia Township and Wutai Township as, which was governed under of Takao Prefecture. Following the Kuomintang takeover of Taiwan in 1945, Sandimen was assigned to Kaohsiung County and, on 16 August 1950, it became a part of the newly established Pingtung County.
The township comprises 10 villages: Anpo, Dalai, Dashe, Dewen, Jingshan, Jingye, Koushe, Mani, Saijia and Sande.