There are many answers depending of what you actually mean by your question.
The actual record number of goals score in World Cup matches is 35 by Ali Daei of Iran, between 1994 and 2006. The record in world cup finals is held by Ronaldo of Brazil who scored 15 goals in the 1998, 2002 and 2006 finals.
In 1958 Just Fontaine scored 13 goals for France making him the record scorer in a finals tournament.
In the 1994 finals Oleg Salenko scored 5 goals against Cameron and during a 2002 Qualifier Archie Thompson scored 13 goals for Australia against Samoa.
A couple of little odd facts
The most own goals in a match was in 2002 between USA and Portugal and 1978 Ernie Brands of Holland became the only player to score at both ends of the pitch
Brazil have scored the most goals in these world cups.
Germany - they scored 14 goals
Yes. Most goals scored in a world cup match is 12.
Hungary scored 27 goals in 1954 which is the world record
Just Fontaine, holds the record for the most goals scored in a single World Cup; all his 13 goals were scored in the 1958.Source: en.wikipedia.org/wiki/FIFA_World_Cup
Germany scored 14 goals in the world cup.
Just Fontaine, holds the record for the most goals scored in a single World Cup; all his 13 goals were scored in the 1958.Source: en.wikipedia.org/wiki/FIFA_World_Cup
willy su tai from Taiwan scored 67 goals
Ronaldo scored 8 goals in the 2002 tournament.
It was scored by Diego Forlan, Thomas Muller.5 goals each.
If you ask who scored the most goals in the world cup, it is Ronaldo Lima of Brazil., with a total of 15 goals the highest by any world cup olayer. But if in a career then it is Pele who scored well over 1200 goals.
The Brazilian Ronaldo has the most goals in a world cup, he has scored 15 goals in all.