Wilt Chamberlain has the most boards in a Conference Finals game, with 30 boards against the Warriors on April 19, 1973.

most reb by a player in a game in the conference finals

NAME	REB	DATE	SEASON	SERIES	TM		OPP	MIN	PTS	AST	STL	BLK	TOV	FGM	FGA	FG%	3PM	3PA	3P%	FTM	FTA	FT%	PF	+/-
Wilt Chamberlain	30	4/19/1973	1972-73	Conference Finals	LAL	vs	GSW	48	5	4				1	3	33.3				3	4	75.0	0
Bismack Biyombo	26	5/21/2016	2015-16	Conference Finals	TOR	vs	CLE	39	7	1	0	4	1	3	6	50.0	0	0		1	2	50.0	3	+12
Nate Thurmond	26	4/17/1973	1972-73	Conference Finals	GSW	@	LAL	48	22	5				8	21	38.1				6	7	85.7	4
Wilt Chamberlain	26	4/18/1972	1971-72	Conference Finals	LAL	vs	MIL	45	12	6				2	3	66.7				8	8	100.0	2
Wes Unseld	26	4/11/1971	1970-71	Conference Finals	BAL	vs	NYK	45	18	9				8	9	88.9				2	3	66.7	1
Moses Malone	25	5/11/1977	1976-77	Conference Finals	HOU	vs	PHI	46	30	0	1	1		11	17	64.7				8	16	50.0	3
Wes Unseld	25	5/7/1975	1974-75	Conference Finals	WAS	vs	BOS	46	16	7				5	11	45.5				6	9	66.7	1
Paul Silas	25	5/3/1975	1974-75	Conference Finals	BOS	vs	WAS	44	10	4				3	11	27.3				4	7	57.1	4
Wilt Chamberlain	25	4/21/1973	1972-73	Conference Finals	LAL	@	GSW	39	12	3				2	2	100.0				8	10	80.0	2
Wilt Chamberlain	25	4/17/1973	1972-73	Conference Finals	LAL	vs	GSW	44	4	2				2	5	40.0				0	0		4
Kareem Abdul-Jabbar	25	4/22/1972	1971-72	Conference Finals	MIL	vs	LAL	48	37	8				16	37	43.2				5	5	100.0	5
Tim Duncan	24	5/23/2003	2002-03	Conference Finals	SAS	@	DAL	42	34	6	2	6	7	12	19	63.2	0	0		10	14	71.4	4	+31
Charles Barkley	24	6/5/1993	1992-93	Conference Finals	PHX	vs	SEA	46	44	1	1	1	1	12	20	60.0	1	1	100.0	19	22	86.4	3
Kareem Abdul-Jabbar	24	4/22/1974	1973-74	Conference Finals	MIL	@	CHI	47	38	4	0	2		18	26	69.2				2	3	66.7	3
Wilt Chamberlain	24	4/22/1972	1971-72	Conference Finals	LAL	@	MIL	48	20	2				8	12	66.7				4	7	57.1	3
Curtis Perry	24	4/22/1972	1971-72	Conference Finals	MIL	vs	LAL	46	8	1				3	5	60.0				2	2	100.0	4
Wilt Chamberlain	24	4/9/1972	1971-72	Conference Finals	LAL	vs	MIL	43	10	0				3	12	25.0				4	16	25.0	3
Wilt Chamberlain	24	4/14/1971	1970-71	Conference Finals	LAL	vs	MIL	48	24	3				9	19	47.4				6	12	50.0	2
Giannis Antetokounmpo	23	5/19/2019	2018-19	Conference Finals	MIL	@	TOR	45	12	7	1	4	8	5	16	31.3	0	3	0.0	2	7	28.6	6	+3
Moses Malone	23	4/26/1981	1980-81	Conference Finals	HOU	vs	KCK	48	42	1	0	1		16	34	47.1	0	0		10	14	71.4	3
Elvin Hayes	23	5/9/1979	1978-79	Conference Finals	WAS	@	SAS	44	15	4	2	1	1	7	20	35.0				1	6	16.7	5
Paul Silas	23	4/22/1973	1972-73	Conference Finals	BOS	@	NYK	49	5	5				2	9	22.2				1	2	50.0	2
Curtis Perry	23	4/9/1972	1971-72	Conference Finals	MIL	@	LAL	42	8	0				3	6	50.0				2	4	50.0	4
Deandre Ayton	22	6/26/2021	2020-21	Conference Finals	PHX	@	LAC	41	19	3	1	4	3	8	14	57.1	0	0		3	3	100.0	4	+8
Ben Wallace	22	5/22/2004	2003-04	Conference Finals	DET	@	IND	39	11	5	1	5	1	5	11	45.5	0	0		1	2	50.0	5	0