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Liga Sudamericana de Básquetbol
Season	1998
Dates	4 February – 12 May 1998
Teams	16
Finals
Champions	Atenas
Runners-up	Cougar Franca
Semifinalists	Boca Juniors Independiente de General Pico
← 1997 1999 →

The 1998 Liga Sudamericana de Básquetbol, or 1998 FIBA South American League, was the third edition of the second-tier tournament for professional basketball clubs from South America. The tournament began on 4 February 1998 and finished on 12 May 1998. Defending champions Atenas won their second title, defeating Brazilian club Cougar Franca in the Grand Finals.

Teams were split into four groups of four teams each, and played each other in a home-and-away round-robin format. The top two teams from each group advanced to the final stage, a best-of-three direct playoff elimination where the champion was decided.

Country	Team
Argentina	Atenas
	Boca Juniors
	Independiente de General Pico
Bolivia	Ingavi de La Paz
Brazil	Marathon Franca
	Mogi das Cruzes
Chile	Universidad Católica
	Universidad de Concepción
Colombia	Leopardos de Bucamaranga
Ecuador	Ciudad de Loja
Paraguay	San José
Peru	Esofa de Lima
Uruguay	Aguada
	Cordón
Venezuela	Cocodrilos de Caracas
	Guaiqueríes de Margarita

Pos	Team	Pld	W	L	Pts	Qualification		ATE	SAN	CON	AGU
1	Atenas	6	6	0	12	Advances to final stage		—	112–71	123–86	92–78
2	San José	6	3	3	9			59–88	—	86–78	89–86
3	Universidad de Concepción	6	2	4	8			71–94	85–81	—	96–90
4	Aguada	6	1	5	7			81–89	86–98	99–72	—

Pos	Team	Pld	W	L	Pts	Qualification		FRA	LEO	GUA	LOJ
1	Cougar Franca	6	6	0	12	Advances to final stage		—	116–86	139–114	147–56
2	Leopardos de Bucamaranga	6	3	3	9			73–87	—	110–86	93–78
3	Guaiqueríes de Margarita	6	2	4	8			67–88	101–100	—	102–74
4	Ciudad de Loja	6	1	5	7			71–103	71–90	100–94	—

Pos	Team	Pld	W	L	Pts	Qualification		BOC	COD	UCA	ING
1	Boca Juniors	6	6	0	12	Advances to final stage		—	126–86	112–68	134–104
2	Cordón	6	4	2	10			80–104	—	110–80	101–60
3	Universidad Católica	6	2	4	8			101–143	84–87	—	100–96
4	Ingavi de La Paz	6	0	6	6			89–114	81–100	71–104	—

Pos	Team	Pld	W	L	Pts	Qualification		IND	MOG	COC	ESO
1	Independiente de General Pico	6	6	0	12	Advances to final stage		—	109–106	130–66	123–62
2	Mogi das Cruzes	6	4	2	10			88–96	—	98–77	143–85
3	Cocodrilos de Caracas	6	2	4	8			96–103	69–74	—	97–61
4	Esofa de Lima	6	0	6	6			61–96	73–99	87–127	—

	Quarterfinals				Semifinals				Grand Finals
	Cougar Franca	2
	Mogi das Cruzes	0
					Cougar Franca	2
					Independiente de General Pico	1
	Independiente de General Pico	2
	Leopardos de Medellin	0
									Cougar Franca	0
									Atenas	2
	Boca Juniors	2
	San José	0
					Boca Juniors	1
					Atenas	2
	Atenas	2
	Cordón	0

Atenas Cordoba: Marcelo Milanesio, Steve Edwards, Darrell Anderson, Fabricio Oberto, Diego Osella - Héctor Campana, Leandro Palladino. Coach: Rubén Magnano

Cougar Franca: Helinho, Demétrius Conrado Ferraciú, Chuí, Rogério Klafke, Jose Vargas - Christopher Knights. Coach: Hélio Rubens

Season MVP: Fabricio Oberto