A hike in fares has led to a dip in the number of passengers who think buses are good value for money, Department for Transport statistics show.
The basic fare on London's buses rose by 20p to £1.20 in January.
Between October and December 2004 passengers rated value-for-money at 71 out of 100. From January to March 2005 that dropped to 66 out of 100.
The London figures dragged the value for money statistics for all England's bus passengers down from 73 to 70.
Across England in the first three months of 2005 the average satisfaction score given by passengers was 81.
That is up from a figure of 80 given in the last three months of last year.
People said the buses were just as reliable, but were happier with bus stop information - satisfaction across England rose two points.