| Club: | Boca Juniors |
| Season: | 1998–99 |
| Chairman: | Mauricio Macri |
| Chrtitle: | President |
| Manager: | Carlos Bianchi |
| Stadium: | La Bombonera |
| League: | Apertura Tournament |
| League Result: | Champion (23rd. title) |
| Cup2: | Clausura Tournament |
| Cup2 Result: | Champion (24th. title) |
| Season Topscorer: | Martín Palermo (32) |
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| Prevseason: | 1997–98 |
| Nextseason: | 1999–2000 |
The 1998–99 Club Atlético Boca Juniors season was the 69th consecutive Primera División season played by the senior squad.
After the 1998 FIFA World Cup in France, a new head coach arrived to the club: Carlos Bianchi former Velez Sarsfield manager wherein clinched 1994 Intercontinental Cup, 1994 Copa Libertadores and several local titles.[1] The squad is reinforced with Barijho (a petition from Bianchi),[2] Pereda and right back defender Hugo Ibarra.[3] Also midfielder José Basualdo returned to the club. Finally, the team won undefeated[4] the Apertura Tournament after a drought of 6 years aimed by a solid formation with Martin Palermo scoring 20 goals in 19 matches.
Alternate kits only worn in 1999 Copa Mercosur:
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| width=3% | Pos. | width=32% | Name | width=30% | from | width=35% | Type |
| FW | |||||||
| DF | |||||||
| MF | |||||||
| MF | José Antonio Pereda | ||||||
| MF | |||||||
| Out | |||||||
|---|---|---|---|---|---|---|---|
| width=3% | Pos. | width=32% | Name | width=30% | To | width=35% | Type |
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| MF | |||||||
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| DF | Definitive | ||||||
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See main article: 1998–99 Argentine Primera División.