"Unbreakable Love" (Chinese: 永不失聯的愛; pinyin: Yǒng bù shī lián de ài; lit. Love that never loses contact) is a single recorded by Taiwanese singer-songwriter Eric Chou. It was released through Sony Music Taiwan on May 24, 2017, for his third studio album The Chaos After You (2017). The pop ballad was written by Rao Xueman, composed by Chou, and produced by Yuan Weixiang and Lu Shengfei.

"Unbreakable Love" serves as the theme for the online drama The Elfin's Golden Castle (2018) and is also featured as an interlude in the television series Second Place's Counterattack (2021).

The plot of The Elfin's Golden Castle was adapted from Rao Xueman's novel. During the filming process, Chou, the male lead, was informed by Rao about the need for a theme song. While others were filming, Chou started humming a melody that he found promising. He recorded it on his phone, completed the song the next day. When he shared it with Rao, she wrote the lyrics within only a day.