Tsai Jeong-duen

{{family name hatnote|Tsai|lang=Chinese}}

{{Infobox Judge

| honorific-prefix =

| name = Tsai Jeong-duen

| native_name = {{No bold|蔡烱燉}}

| native_name_lang = zh-Hant

| image = 蔡烱燉大法官 (cropped).jpg

| caption = Official portrait, 2016

| order1 = 13th

| office1 = Vice President of the Judicial Yuan

| term_start1 = 1 November 2016

| term_end1 = 1 November 2024

| president1 = Hsu Tzong-li

| predecessor1 = Su Yeong-chin

| successor1 = Vacant

| birth_date = {{b-da|1953}}

| birth_place =

| nationality = Taiwan

| party = Independent (2012－present)

| otherparty = Kuomintang (－2012)

| spouse =

| children =

| education = National Chengchi University (LLB, PhD)
National Chung Hsing University (LLM)

}}

Tsai Jeong-duen ({{zh|t=蔡烱燉|p=Cài Jiǒngdùn}}) is a Taiwanese judge who currently serves as the vice president of Judicial Yuan since 1 November 2016.