Tennis was contested at the 1978 Asian Games in Bangkok, Thailand from December 10 to December 19, 1978. Tennis had doubles and singles events for men and women, as well as a mixed doubles competition.
Indonesia dominated the competition, finishing first in medal table with 3 gold medals.
| Men's singles | |||
| Men's doubles | Yustedjo Tarik Hadiman | Xu Meilin Gu Minghua | Shyam Minotra Chiradip Mukerjea |
Pichet Boratisa Charuek Hengrasmee | |||
| Men's team | Hadiman Yustedjo Tarik Gondo Widjojo Atet Wijono | Jamil Ahmed Nasir Munir Ahmed Altaf Hussain Nadir Ali Khan | Gu Minghua Sun Chunlai Wang Fuzhang Xu Meilin |
Tetsu Kuramitsu Shigeyuki Nishio Etsuo Uchiyama | |||
| Women's singles | |||
| Women's doubles | Lee Duk-hee Yang Jeong-soon | Kimiyo Hatanaka Kiyoko Nomura | Chen Juan Yu Liqiao |
Suthasini Sirikaya Sirikanya Hoonsiri | |||
| Women's team | Kimiyo Hatanaka Matsuko Matsushima Kiyoko Nomura Sonoe Yonezawa | Kim Nam-sook Kim Soo-ok Lee Duk-hee Yang Jeong-soon | Lita Sugiarto Yolanda Soemarno Ayi Sutarno Elvis Tarik |
| Mixed doubles | Charuek Hengrasmee Suthasini Sirikaya | Etsuo Uchiyama Matsuko Matsushima | Hadiman Ayi Sutarno |
Shigeyuki Nishio Kimiyo Hatanaka |